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src: properly configure default heap limits #25576

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commented Jan 18, 2019

Unless configured, V8 defaults to limiting the max heaps size to 700 MB
or 1400MB on 32 and 64-bit platforms respectively. This default is
based on the browser use-cases and doesn't make a lot of sense
generally. This change properly configures the heap size based on
actual available memory.

This should reduce the number of instances where we run out of memory processing larger data-sets. It is still possible to pass --max-old-space-size to use a different limit.

CI: https://ci.nodejs.org/job/node-test-pull-request/20203/
CI: https://ci.nodejs.org/job/node-test-pull-request/20310/

Checklist
  • make -j4 test (UNIX), or vcbuild test (Windows) passes
  • tests and/or benchmarks are included
  • commit message follows commit guidelines

@ofrobots ofrobots requested a review from hashseed Jan 18, 2019

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commented Jan 18, 2019

What will this do if the total memory is small like something in a 128M cloud container?

I think I've seen Node.js be able to have heaps which are bigger than the available memory (which with a default of 1.4G could often be the case for containers) and things still run ok because some parts are paged out.

I'm wondering if this might cause some of those deployments to start failing?

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commented Jan 18, 2019

Also do you have a quick overview of how the size of the heap is configured based on the total memory. For example if I have 32GB of memory is it one for one so that its x% of 32G. If so what is x%?

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commented Jan 18, 2019

We probalby need to add at least a doc update somewhere that explains the behaviour change that people will see as part of this PR.

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NewIsolate is exposed to embedders, do they have any issues with the new default?

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commented Jan 19, 2019

@mhdawson

What will this do if the total memory is small like something in a 128M cloud container?
Also do you have a quick overview of how the size of the heap is configured based on the total memory. For example if I have 32GB of memory is it one for one so that its x% of 32G. If so what is x%?

The details of how heap sizes this is computed presently by following the logic in ResourceConstraints::ConfigureDefaults. Right now, V8 still seems to have a hard-coded ceiling of 2GB on the old generation size.

size_t Heap::ComputeMaxOldGenerationSize(uint64_t physical_memory) {
  const size_t old_space_physical_memory_factor = 4;
  size_t computed_size = static_cast<size_t>(physical_memory / i::MB /
                                             old_space_physical_memory_factor *
                                             kPointerMultiplier);
  return Max(Min(computed_size, HeapController::kMaxSize),
             HeapController::kMinSize);
}

There is a floor of 256MB and a ceiling of 2048MB.

To summarize the behavior change, given current implementation of V8 (restricting discussion to 64-bit builds):

  • Machines with less than <512MB RAM will configure old space to be 256MB instead of 1400MB. This is a behavior change but this is arguably better than using an old space 10x larger than total physical memory on a 128MB machine.
  • Machines with between 512MB - 2.8GB RAM will see a reduction of max old space size. This is a behavior change that we should probably think more about.
  • Machines with more than 2.8GB RAM will see an increase of the old space size up to a ceiling of 2048MB. This is fine, although the hard-coded ceiling of 2GB is too low.

With this spelled out, it is worth pausing and thinking about this more deeply. I do think we need change the default on large machines. I routinely see workloads where the job fails with 'out of memory' when there clearly is enough memory available.

Note that this touches on the implementation details of the Heap in V8 which will likely change as V8 changes. My aim here was to provide V8 more information to configure the heap sizes more intelligently. Node.js unilaterally deciding the memory limits is likely not a good solution. Nor do we expect that default value hard-coded in V8 would match our use-cases.

I'll reflect upon this more, and if people have opinions, it would be great to hear them.

/cc @nodejs/v8.

@targos

targos approved these changes Jan 19, 2019

src/node.cc Outdated
@@ -1813,6 +1813,14 @@ bool AllowWasmCodeGenerationCallback(
Isolate* NewIsolate(ArrayBufferAllocator* allocator, uv_loop_t* event_loop) {
Isolate::CreateParams params;
params.array_buffer_allocator = allocator;

double totalMemory = uv_get_total_memory();
if (totalMemory > 0) {

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Two questions:

  1. is it safe to continue if totalMemory < 0 i.e. uv_get_total_memory returned an error?
  2. semver-ity (in continuation of discussion thread). Maybe this should be major and so we can think less about nuanced implications?

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P.S. does this have priority over CLI parameters (e.g. --max-old-space-size)?

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P.S. does this have priority over CLI parameters (e.g. --max-old-space-size)?

No, the CLI flags take precedence.

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ofrobots Jan 23, 2019

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is it safe to continue if totalMemory < 0 i.e. uv_get_total_memory returned an error?

I believe so. For whatever reason (security policy?) we don't know how much memory is available, but that doesn't imply memory allocation is going to fail.

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commented Jan 19, 2019

  • Machines with less than <512MB RAM will configure old space to be 256MB instead of 1400MB. This is a behavior change but this is arguably better than using an old space 10x larger than total physical memory on a 128MB machine.
  • Machines with between 512MB - 2.8GB RAM will see a reduction of max old space size. This is a behavior change that we should probably think more about.
  • Machines with more than 2.8GB RAM will see an increase of the old space size up to a ceiling of 2048MB. This is fine, although the hard-coded ceiling of 2GB is too low.

Maybe we can code these limitation here (and keep this < semver-minor)? Or alternatively mark this as semver-major?

@refack refack added the V8 Engine label Jan 19, 2019

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Not a counterargument but for your consideration:

One reason we never changed the defaults so far (it's come up a few times) is that node is often used in a multi-process setup. With that kind of workload you don't want to use physical memory as an input signal because you'll overcommit.

(It speaks in this PR's favor that it still has an upper limit in place so it's unlikely it'll go completely runaway.)

src/node.cc Outdated
@@ -1813,6 +1813,14 @@ bool AllowWasmCodeGenerationCallback(
Isolate* NewIsolate(ArrayBufferAllocator* allocator, uv_loop_t* event_loop) {
Isolate::CreateParams params;
params.array_buffer_allocator = allocator;

double totalMemory = uv_get_total_memory();

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Style: total_memory

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ofrobots Jan 23, 2019

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Done.

src/node.cc Outdated
@@ -1813,6 +1813,14 @@ bool AllowWasmCodeGenerationCallback(
Isolate* NewIsolate(ArrayBufferAllocator* allocator, uv_loop_t* event_loop) {
Isolate::CreateParams params;
params.array_buffer_allocator = allocator;

double totalMemory = uv_get_total_memory();
if (totalMemory > 0) {

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P.S. does this have priority over CLI parameters (e.g. --max-old-space-size)?

No, the CLI flags take precedence.

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commented Jan 23, 2019

With that kind of workload you don't want to use physical memory as an input signal because you'll overcommit

Setting the max old space limit is not necessarily the same as over-committing. It just means that we now allow old space can grow to that value if the processes really needs to consume that much memory. The cases where I expect the behavior changes is when we run memory hungry processes on an under-provisioned machine. In such a scenario, today, things would run out of memory and crash. We would change the behavior so that the programs run for a bit longer (on swap) before crashing. IMO, we are changing an error outcome to a slightly different error outcome. And, as you observe also, the ceiling of 2GB limits the runaway case for leaky/buggy programs.

@ofrobots ofrobots force-pushed the ofrobots:default-max-heap-size branch from 93966b2 to 0cb38e2 Jan 23, 2019

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commented Jan 23, 2019

Maybe we can code these limitation here (and keep this < semver-minor)? Or alternatively mark this as semver-major?

I think the new behavior is more sensible, specially on low-memory machines. I'm fine with calling this a semver-major.

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commented Jan 28, 2019

I am going to land this tomorrow unless objections show up. /cc @mhdawson

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commented Jan 30, 2019

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commented Jan 31, 2019

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commented Jan 31, 2019

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commented Jan 31, 2019

AIX seems to be having infrastructure issues - Java errors. Another resume build: https://ci.nodejs.org/job/node-test-pull-request/20490/

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commented Feb 1, 2019

This has merge conflicts that need resolving. Can we resolve them and try CI again?

@addaleax addaleax removed the author ready label Feb 1, 2019

@ofrobots ofrobots force-pushed the ofrobots:default-max-heap-size branch 2 times, most recently from 494f473 to 56aff54 Feb 1, 2019

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commented Feb 1, 2019

Rebased. Launched new CI: https://ci.nodejs.org/job/node-test-pull-request/20517/. May the CI gods looks favorably upon this one and keep the Demons of Flakes away.

EDIT: who needs CI demons when I can bungle things myself?

New CI: https://ci.nodejs.org/job/node-test-pull-request/20518/

@ofrobots ofrobots force-pushed the ofrobots:default-max-heap-size branch from 56aff54 to 5a0e12c Feb 1, 2019

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commented Feb 1, 2019

@ofrobots I think this needs to be rebased against #25541 in some other way?

src: properly configure default heap limits
Unless configured, V8 defaults to limiting the max heaps size to 700 MB
or 1400MB on 32 and 64-bit platforms respectively. This default is
based on the browser use-cases and doesn't make a lot of sense
generally. This change properly configures the heap size based on
actual available memory.

@ofrobots ofrobots force-pushed the ofrobots:default-max-heap-size branch from 5a0e12c to 267218a Feb 1, 2019

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commented Feb 1, 2019

@addaleax Indeed. I merged things wrong. Here's a new CI: https://ci.nodejs.org/job/node-test-pull-request/20520/

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commented Feb 1, 2019

Landed in 1d996f5.

@ofrobots ofrobots closed this Feb 1, 2019

@ofrobots ofrobots deleted the ofrobots:default-max-heap-size branch Feb 1, 2019

ofrobots added a commit that referenced this pull request Feb 1, 2019

src: properly configure default heap limits
Unless configured, V8 defaults to limiting the max heaps size to 700 MB
or 1400MB on 32 and 64-bit platforms respectively. This default is
based on the browser use-cases and doesn't make a lot of sense
generally. This change properly configures the heap size based on
actual available memory.

PR-URL: #25576
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Yang Guo <yangguo@chromium.org>
Reviewed-By: Ujjwal Sharma <usharma1998@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

@BethGriggs BethGriggs referenced this pull request Mar 26, 2019

Merged

v12.0.0 proposal #26930

BethGriggs added a commit that referenced this pull request Apr 22, 2019

2019-04-23, Version 12.0.0 (Current)
Notable changes:

* assert:
  * improve performance to instantiate errors (Ruben Bridgewater)
    [#26738](#26738)
  * validate required arguments (Ruben Bridgewater)
    [#26641](#26641)
  * adjust loose assertions (Ruben Bridgewater)
    [#25008](#25008)
* async_hooks:
  * remove deprecated emitBefore and emitAfter (Matteo Collina)
    [#26530](#26530)
  * remove promise object from resource (Andreas Madsen)
    [#23443](#23443)
* bootstrap
  * make Buffer and process non-enumerable (Ruben Bridgewater)
    [#24874](#24874)
* buffer:
  * use stricter range checks (Ruben Bridgewater)
    [#27045](#27045)
  * harden SlowBuffer creation (ZYSzys)
    [#26272](#26272)
  * harden validation of buffer allocation size (ZYSzys)
    [#26162](#26162)
  * do proper error propagation in addon methods (Anna Henningsen)
    [#23939](#23939)
* child_process:
  * change the defaults maxBuffer size (kohta ito)
    [#27179](#27179)
  * harden fork arguments validation (ZYSzys)
    [#27039](#27039)
  * use non-infinite maxBuffer defaults (kohta ito)
    [#23027](#23027)
* console:
  * don't use ANSI escape codes when TERM=dumb (Vladislav Kaminsky)
    [#26261](#26261)
* crypto:
  * remove legacy native handles (Tobias Nießen)
    [#27011](#27011)
  * decode missing passphrase errors (Tobias Nießen)
    [#25208](#25208)
  * move DEP0113 to End-of-Life (Tobias Nießen)
    [#26249](#26249)
  * remove deprecated crypto.\_toBuf (Tobias Nießen)
    [#25338](#25338)
  * set `DEFAULT\_ENCODING` property to non-enumerable
    (Antoine du Hamel)
    [#23222](#23222)
* deps:
  * silence irrelevant V8 warning (Michaël Zasso)
    [#26685](#26685)
  * update postmortem metadata generation script (cjihrig)
    [#26685](#26685)
  * V8: un-cherry-pick bd019bd (Refael Ackermann)
    [#26685](#26685)
  * V8: cherry-pick 6 commits (Michaël Zasso)
    [#26685](#26685)
  * V8: cherry-pick d82c9af (Anna Henningsen)
    [#26685](#26685)
  * V8: cherry-pick e5f01ba (Anna Henningsen)
    [#26685](#26685)
  * V8: cherry-pick d5f08e4 (Anna Henningsen)
    [#26685](#26685)
  * V8: cherry-pick 6b09d21 (Anna Henningsen)
    [#26685](#26685)
  * V8: cherry-pick f0bb5d2 (Anna Henningsen)
    [#26685](#26685)
  * V8: cherry-pick 5b0510d (Anna Henningsen)
    [#26685](#26685)
  * V8: cherry-pick 91f0cd0 (Anna Henningsen)
    [#26685](#26685)
  * V8: cherry-pick 392316d (Anna Henningsen)
    [#26685](#26685)
  * V8: cherry-pick 2f79d68 (Anna Henningsen)
    [#26685](#26685)
  * sync V8 gypfiles with 7.4 (Ujjwal Sharma)
    [#26685](#26685)
  * update V8 to 7.4.288.13 (Ujjwal Sharma)
    [#26685](#26685)
  * bump minimum icu version to 63 (Ujjwal Sharma)
    [#25852](#25852)
  * silence irrelevant V8 warnings (Michaël Zasso)
    [#25852](#25852)
  * V8: cherry-pick 7803fa6 (Jon Kunkee)
    [#25852](#25852)
  * V8: cherry-pick 58cefed (Jon Kunkee)
    [#25852](#25852)
  * V8: cherry-pick d3308d0 (Michaël Zasso)
    [#25852](#25852)
  * V8: cherry-pick 74571c8 (Michaël Zasso)
    [#25852](#25852)
  * cherry-pick fc0ddf5 from upstream V8 (Anna Henningsen)
    [#25852](#25852)
  * sync V8 gypfiles with 7.3 (Ujjwal Sharma)
    [#25852](#25852)
  * sync V8 gypfiles with 7.2 (Michaël Zasso)
    [#25852](#25852)
  * update V8 to 7.3.492.25 (Michaël Zasso)
    [#25852](#25852)
  * add s390 asm rules for OpenSSL-1.1.1 (Shigeki Ohtsu)
    [#19794](#19794)
  * sync V8 gypfiles with 7.1 (Refael Ackermann)
    [#23423](#23423)
  * update V8 to 7.1.302.28 (Michaël Zasso)
    [#23423](#23423)
* doc:
  * update behaviour of fs.writeFile
    (Sakthipriyan Vairamani (thefourtheye))
    [#25080](#25080)
  * add internal functionality details of util.inherits
    (Ruben Bridgewater)
    [#24755](#24755)
* errors:
  * update error name (Ruben Bridgewater)
    [#26738](#26738)
* fs:
  * use proper .destroy() implementation for SyncWriteStream
    (Matteo Collina)
    [#26690](#26690)
  * improve mode validation (Ruben Bridgewater)
    [#26575](#26575)
  * harden validation of start option in createWriteStream (ZYSzys)
    [#25579](#25579)
  * make writeFile consistent with readFile wrt fd
    (Sakthipriyan Vairamani (thefourtheye))
    [#23709](#23709)
* http:
  * validate timeout in ClientRequest() (cjihrig)
    [#26214](#26214)
  * return HTTP 431 on HPE\_HEADER\_OVERFLOW error (Albert Still)
    [#25605](#25605)
  * switch default parser to llhttp (Anna Henningsen)
    [#24870](#24870)
  * change DEP0066 to a runtime deprecation (Morgan Roderick)
    [#24167](#24167)
  * else case is not reachable (szabolcsit)
    [#24176](#24176)
* lib:
  * move DEP0021 to end of life (cjihrig)
    [#27127](#27127)
  * remove Atomics.wake (Gus Caplan)
    [#27033](#27033)
  * validate Error.captureStackTrace() calls (Ruben Bridgewater)
    [#26738](#26738)
  * refactor Error.captureStackTrace() usage (Ruben Bridgewater)
    [#26738](#26738)
  * move DTRACE\_\* probes out of global scope (James M Snell)
    [#26541](#26541)
  * deprecate \_stream\_wrap (Sam Roberts)  [#26245]
  (#26245)
  * don't use `util.inspect()` internals (Ruben Bridgewater)
    [#24971](#24971)
  * improve error message for MODULE\_NOT\_FOUND (Ali Ijaz Sheikh)
    [#25690](#25690)
  * requireStack property for MODULE\_NOT\_FOUND (Ali Ijaz Sheikh)
    [#25690](#25690)
  * move DEP0029 to end of life (cjihrig)
    [#25377](#25377)
  * move DEP0028 to end of life (cjihrig)
    [#25377](#25377)
  * move DEP0027 to end of life (cjihrig)
    [#25377](#25377)
  * move DEP0026 to end of life (cjihrig)
    [#25377](#25377)
  * move DEP0023 to end of life (cjihrig)
    [#25280](#25280)
  * move DEP0006 to end of life (cjihrig)
    [#25279](#25279)
  * remove unintended access to deps/ (Anna Henningsen)
    [#25138](#25138)
  * move DEP0120 to end of life (cjihrig)
    [#24862](#24862)
  * use ES6 class inheritance style (Ruben Bridgewater)
    [#24755](#24755)
  * remove `inherits()` usage (Ruben Bridgewater)
    [#24755](#24755)
* module:
  * remove dead code (Ruben Bridgewater)
    [#26983](#26983)
  * mark DEP0019 as End-of-Life (Ruben Bridgewater)
    [#26973](#26973)
  * throw an error for invalid package.json main entries
    (Ruben Bridgewater)
    [#26823](#26823)
  * don't search in require.resolve.paths (cjihrig)
    [#23683](#23683)
* n-api:
  * remove code from error name (Ruben Bridgewater)
    [#26738](#26738)
* net:
  * do not manipulate potential user code (Ruben Bridgewater)
    [#26751](#26751)
  * emit "write after end" errors in the next tick (Ouyang Yadong)
    [#24457](#24457)
  * deprecate \_setSimultaneousAccepts() undocumented function
    (James M Snell)
    [#23760](#23760)
* net,http2:
  * merge setTimeout code (ZYSzys)
    [#25084](#25084)
* os:
  * implement os.type() using uv\_os\_uname() (cjihrig)
    [#25659](#25659)
* process:
  * global.process, global.Buffer getters (Guy Bedford)
    [#26882](#26882)
  * move DEP0062 (node --debug) to end-of-life (Joyee Cheung)
    [#25828](#25828)
  * exit on --debug and --debug-brk after option parsing (Joyee Cheung)
    [#25828](#25828)
  * improve `--redirect-warnings` handling (Ruben Bridgewater)
    [#24965](#24965)
* readline:
  * support TERM=dumb (Vladislav Kaminsky)
    [#26261](#26261)
* repl:
  * add welcome message (gengjiawen)
    [#25947](#25947)
  * fix terminal default setting (Ruben Bridgewater)
    [#26518](#26518)
  * check colors with .getColorDepth() (Vladislav Kaminsky)
    [#26261](#26261)
  * deprecate REPLServer.rli (Ruben Bridgewater)
    [#26260](#26260)
* src:
  * remove unused INT\_MAX constant (Sam Roberts)
    [#27078](#27078)
  * update NODE\_MODULE\_VERSION to 72 (Ujjwal Sharma)
    [#26685](#26685)
  * remove `AddPromiseHook()` (Anna Henningsen)
    [#26574](#26574)
  * update NODE\_MODULE\_VERSION to 71 (Michaël Zasso)
    [#25852](#25852)
  * clean up MultiIsolatePlatform interface (Anna Henningsen)
    [#26384](#26384)
  * properly configure default heap limits (Ali Ijaz Sheikh)
    [#25576](#25576)
  * remove icuDataDir from node config (GauthamBanasandra)
    [#24780](#24780)
  * explicitly allow JS in ReadHostObject (Yang Guo)
    [#23423](#23423)
  * update postmortem constant (cjihrig)
    [#23423](#23423)
  * update NODE\_MODULE\_VERSION to 68 (Michaël Zasso)
    [#23423](#23423)
* tls:
  * support TLSv1.3 (Sam Roberts)
    [#26209](#26209)
  * return correct version from getCipher() (Sam Roberts)
    [#26625](#26625)
  * check arg types of renegotiate() (Sam Roberts)
    [#25876](#25876)
  * add code for ERR\_TLS\_INVALID\_PROTOCOL\_METHOD (Sam Roberts)
    [#24729](#24729)
  * emit a warning when servername is an IP address (Rodger Combs)
    [#23329](#23329)
  * disable TLS v1.0 and v1.1 by default (Ben Noordhuis)
    [#23814](#23814)
  * remove unused arg to createSecureContext() (Sam Roberts)
    [#24241](#24241)
  * deprecate Server.prototype.setOptions() (cjihrig)[
    #23820](#23820)
  * load NODE\_EXTRA\_CA\_CERTS at startup (Ouyang Yadong)
    [#23354](#23354)
* util:
  * change inspect compact and breakLength default (Ruben Bridgewater)
    [#27109](#27109)
  * improve inspect edge cases (Ruben Bridgewater)
    [#27109](#27109)
  * only the first line of the error message (Simon Zünd)
    [#26685](#26685)
  * don't set the prototype of callbackified functions
    (Ruben Bridgewater)
    [#26893](#26893)
  * rename callbackified function (Ruben Bridgewater)
    [#26893](#26893)
  * increase function length when using `callbackify()`
    (Ruben Bridgewater)
    [#26893](#26893)
  * prevent tampering with internals in `inspect()` (Ruben Bridgewater)
    [#26577](#26577)
  * fix proxy inspection (Ruben Bridgewater)
    [#26241](#26241)
  * prevent leaking internal properties (Ruben Bridgewater)
    [#24971](#24971)
  * protect against monkeypatched Object prototype for inspect()
    (Rich Trott)
    [#25953](#25953)
  * treat format arguments equally (Roman Reiss)
    [#23162](#23162)
* win, fs:
  * detect if symlink target is a directory (Bartosz Sosnowski)
    [#23724](#23724)
* zlib:
  * throw TypeError if callback is missing (Anna Henningsen)[
    #24929](#24929)
  * make “bare” constants un-enumerable (Anna Henningsen)
    [#24824](#24824)

PR-URL: #26930

BethGriggs added a commit that referenced this pull request Apr 23, 2019

2019-04-23, Version 12.0.0 (Current)
Notable changes:

* assert:
    * validate required arguments (Ruben Bridgewater)
      [#26641](#26641)
    * adjust loose assertions (Ruben Bridgewater)
      [#25008](#25008)
* async_hooks:
    * remove deprecated `emitBefore` and `emitAfter` (Matteo Collina)
      [#26530](#26530)
    * remove promise object from resource (Andreas Madsen)
      [#23443](#23443)
* bootstrap: make Buffer and process non-enumerable (Ruben Bridgewater)
      [#24874](#24874)
* buffer:
    * use stricter range checks (Ruben Bridgewater)
      [#27045](#27045)
    * harden `SlowBuffer` creation (ZYSzys)
      [#26272](#26272)
    * harden validation of buffer allocation size (ZYSzys)
      [#26162](#26162)
    * do proper error propagation in addon methods (Anna Henningsen)
      [#23939](#23939)
* child_process:
    * remove `options.customFds` (cjihrig)
      [#25279](#25279)
    * harden fork arguments validation (ZYSzys)
      [#27039](#27039)
    * use non-infinite `maxBuffer` defaults (kohta ito)
      [#23027](#23027)
* console:
    * don't use ANSI escape codes when `TERM=dumb` (Vladislav Kaminsky)
      [#26261](#26261)
* crypto:
    * remove legacy native handles (Tobias Nießen)
      [#27011](#27011)
    * decode missing passphrase errors (Tobias Nießen)
      [#25208](#25208)
    * remove `Cipher.setAuthTag()` and `Decipher.getAuthTag()`
      (Tobias Nießen)
      [#26249](#26249)
    * remove deprecated `crypto._toBuf()` (Tobias Nießen)
      [#25338](#25338)
    * set `DEFAULT\_ENCODING` property to non-enumerable
      (Antoine du Hamel)
      [#23222](#23222)
* deps:
    * update V8 to 7.4.288.13
    (Michaël Zasso, cjihrig, Refael Ackermann)
    (Anna Henningsen, Ujjwal Sharma)
      [#26685](#26685)
    * bump minimum icu version to 63 (Ujjwal Sharma)
      [#25852](#25852)
    * update OpenSSL to 1.1.1b (Sam Roberts, Shigeki Ohtsu)
      [#26327](#26327)
* errors:
    * update error name (Ruben Bridgewater)
      [#26738](#26738)
* fs:
    * use proper .destroy() implementation for SyncWriteStream
      (Matteo Collina)
      [#26690](#26690)
    * improve mode validation (Ruben Bridgewater)
      [#26575](#26575)
    * harden validation of start option in `createWriteStream()`
      (ZYSzys)
      [#25579](#25579)
    * make writeFile consistent with readFile wrt fd
      (Sakthipriyan Vairamani (thefourtheye))
      [#23709](#23709)
* http:
    * validate timeout in `ClientRequest()` (cjihrig)
      [#26214](#26214)
    * return HTTP 431 on `HPE_HEADER_OVERFLOW` error (Albert Still)
      [#25605](#25605)
    * switch default parser to llhttp (Anna Henningsen)
      [#24870](#24870)
    * Runtime-deprecate `outgoingMessage._headers` and
      `outgoingMessage._headerNames` (Morgan Roderick)
      [#24167](#24167)
* lib:
    * remove `Atomics.wake()` (Gus Caplan)
      [#27033](#27033)
    * move DTRACE\_\* probes out of global scope (James M Snell)
      [#26541](#26541)
    * deprecate `_stream_wrap` (Sam Roberts)
      [#26245](#26245)
    * use ES6 class inheritance style (Ruben Bridgewater)
      [#24755](#24755)
* module:
    * remove unintended access to deps/ (Anna Henningsen)
      [#25138](#25138)
    * improve error message for MODULE\_NOT\_FOUND (Ali Ijaz Sheikh)
      [#25690](#25690)
    * requireStack property for MODULE\_NOT\_FOUND (Ali Ijaz Sheikh)
      [#25690](#25690)
    * remove dead code (Ruben Bridgewater)
      [#26983](#26983)
    * make `require('.')` never resolve outside the current directory
      (Ruben Bridgewater)
      [#26973](#26973)
    * throw an error for invalid package.json main entries
      (Ruben Bridgewater)
      [#26823](#26823)
    * don't search in `require.resolve.paths` (cjihrig)
      [#23683](#23683)
* net:
    * remove `Server.listenFD()` (cjihrig)
      [#27127](#27127)
    * do not add `.host` and `.port` properties to DNS error
      (Ruben Bridgewater)
      [#26751](#26751)
    * emit "write after end" errors in the next tick (Ouyang Yadong)
      [#24457](#24457)
    * deprecate `_setSimultaneousAccepts()` undocumented function
      (James M Snell)
      [#23760](#23760)
* os:
    * implement `os.type()` using `uv_os_uname()` (cjihrig)
      [#25659](#25659)
    * remove `os.getNetworkInterfaces()` (cjihrig)
      [#25280](#25280)
* process:
    * make global.process, global.Buffer getters (Guy Bedford)
      [#26882](#26882)
    * move DEP0062 (node --debug) to end-of-life (Joyee Cheung)
      [#25828](#25828)
    * exit on --debug and --debug-brk after option parsing
      (Joyee Cheung)
      [#25828](#25828)
    * improve `--redirect-warnings` handling (Ruben Bridgewater)
      [#24965](#24965)
* readline:
    * support TERM=dumb (Vladislav Kaminsky)
      [#26261](#26261)
* repl:
    * add welcome message (gengjiawen)
      [#25947](#25947)
    * fix terminal default setting (Ruben Bridgewater)
      [#26518](#26518)
    * check colors with `.getColorDepth()` (Vladislav Kaminsky)
      [#26261](#26261)
    * deprecate REPLServer.rli (Ruben Bridgewater)
      [#26260](#26260)
* src:
    * remove unused `INT_MAX` constant (Sam Roberts)
      [#27078](#27078)
    * update `NODE_MODULE_VERSION` to 72 (Ujjwal Sharma)
      [#26685](#26685)
    * remove `AddPromiseHook()` (Anna Henningsen)
      [#26574](#26574)
    * clean up `MultiIsolatePlatform` interface (Anna Henningsen)
      [#26384](#26384)
    * properly configure default heap limits (Ali Ijaz Sheikh)
      [#25576](#25576)
    * remove `icuDataDir` from node config (GauthamBanasandra)
      [#24780](#24780)
* tls:
    * support TLSv1.3 (Sam Roberts)
      [#26209](#26209)
    * return correct version from `getCipher()` (Sam Roberts)
      [#26625](#26625)
    * check arg types of renegotiate() (Sam Roberts)
      [#25876](#25876)
    * add code for `ERR_TLS_INVALID_PROTOCOL_METHOD` (Sam Roberts)
      [#24729](#24729)
    * emit a warning when servername is an IP address (Rodger Combs)
      [#23329](#23329)
    * disable TLS v1.0 and v1.1 by default (Ben Noordhuis)
      [#23814](#23814)
    * remove unused arg to createSecureContext() (Sam Roberts)
      [#24241](#24241)
    * deprecate `Server.prototype.setOptions()` (cjihrig)
      [#23820](#23820)
    * load `NODE_EXTRA_CA_CERTS` at startup (Ouyang Yadong)
      [#23354](#23354)
* util:
    * remove `util.print()`, `util.puts()`, `util.debug()`
      and `util.error()` (cjihrig)
      [#25377](#25377)
    * change inspect compact and breakLength default
      (Ruben Bridgewater)
      [#27109](#27109)
    * improve inspect edge cases (Ruben Bridgewater)
      [#27109](#27109)
    * only the first line of the error message (Simon Zünd)
      [#26685](#26685)
    * don't set the prototype of callbackified functions
      (Ruben Bridgewater)
      [#26893](#26893)
    * rename callbackified function (Ruben Bridgewater)
      [#26893](#26893)
    * increase function length when using `callbackify()`
      (Ruben Bridgewater)
      [#26893](#26893)
    * prevent tampering with internals in `inspect()`
      (Ruben Bridgewater)
      [#26577](#26577)
    * prevent Proxy traps being triggered by `.inspect()`
      (Ruben Bridgewater)
      [#26241](#26241)
    * prevent leaking internal properties (Ruben Bridgewater)
      [#24971](#24971)
    * protect against monkeypatched Object prototype for inspect()
      (Rich Trott)
      [#25953](#25953)
    * treat format arguments equally (Roman Reiss)
      [#23162](#23162)
* win, fs:
    * detect if symlink target is a directory (Bartosz Sosnowski)
      [#23724](#23724)
* zlib:
    * throw TypeError if callback is missing (Anna Henningsen)
      [#24929](#24929)
    * make “bare” constants un-enumerable (Anna Henningsen)
      [#24824](#24824)

PR-URL: #26930

BethGriggs added a commit that referenced this pull request Apr 23, 2019

2019-04-23, Version 12.0.0 (Current)
Notable changes:

* assert:
    * validate required arguments (Ruben Bridgewater)
      [#26641](#26641)
    * adjust loose assertions (Ruben Bridgewater)
      [#25008](#25008)
* async_hooks:
    * remove deprecated `emitBefore` and `emitAfter` (Matteo Collina)
      [#26530](#26530)
    * remove promise object from resource (Andreas Madsen)
      [#23443](#23443)
* bootstrap: make Buffer and process non-enumerable (Ruben Bridgewater)
      [#24874](#24874)
* buffer:
    * use stricter range checks (Ruben Bridgewater)
      [#27045](#27045)
    * harden `SlowBuffer` creation (ZYSzys)
      [#26272](#26272)
    * harden validation of buffer allocation size (ZYSzys)
      [#26162](#26162)
    * do proper error propagation in addon methods (Anna Henningsen)
      [#23939](#23939)
* child_process:
    * remove `options.customFds` (cjihrig)
      [#25279](#25279)
    * harden fork arguments validation (ZYSzys)
      [#27039](#27039)
    * use non-infinite `maxBuffer` defaults (kohta ito)
      [#23027](#23027)
* console:
    * don't use ANSI escape codes when `TERM=dumb` (Vladislav Kaminsky)
      [#26261](#26261)
* crypto:
    * remove legacy native handles (Tobias Nießen)
      [#27011](#27011)
    * decode missing passphrase errors (Tobias Nießen)
      [#25208](#25208)
    * remove `Cipher.setAuthTag()` and `Decipher.getAuthTag()`
      (Tobias Nießen)
      [#26249](#26249)
    * remove deprecated `crypto._toBuf()` (Tobias Nießen)
      [#25338](#25338)
    * set `DEFAULT\_ENCODING` property to non-enumerable
      (Antoine du Hamel)
      [#23222](#23222)
* deps:
    * update V8 to 7.4.288.13
    (Michaël Zasso, cjihrig, Refael Ackermann)
    (Anna Henningsen, Ujjwal Sharma)
      [#26685](#26685)
    * bump minimum icu version to 63 (Ujjwal Sharma)
      [#25852](#25852)
    * update OpenSSL to 1.1.1b (Sam Roberts, Shigeki Ohtsu)
      [#26327](#26327)
* errors:
    * update error name (Ruben Bridgewater)
      [#26738](#26738)
* fs:
    * use proper .destroy() implementation for SyncWriteStream
      (Matteo Collina)
      [#26690](#26690)
    * improve mode validation (Ruben Bridgewater)
      [#26575](#26575)
    * harden validation of start option in `createWriteStream()`
      (ZYSzys)
      [#25579](#25579)
    * make writeFile consistent with readFile wrt fd
      (Sakthipriyan Vairamani (thefourtheye))
      [#23709](#23709)
* http:
    * validate timeout in `ClientRequest()` (cjihrig)
      [#26214](#26214)
    * return HTTP 431 on `HPE_HEADER_OVERFLOW` error (Albert Still)
      [#25605](#25605)
    * switch default parser to llhttp (Anna Henningsen)
      [#24870](#24870)
    * Runtime-deprecate `outgoingMessage._headers` and
      `outgoingMessage._headerNames` (Morgan Roderick)
      [#24167](#24167)
* lib:
    * remove `Atomics.wake()` (Gus Caplan)
      [#27033](#27033)
    * move DTRACE\_\* probes out of global scope (James M Snell)
      [#26541](#26541)
    * deprecate `_stream_wrap` (Sam Roberts)
      [#26245](#26245)
    * use ES6 class inheritance style (Ruben Bridgewater)
      [#24755](#24755)
* module:
    * remove unintended access to deps/ (Anna Henningsen)
      [#25138](#25138)
    * improve error message for MODULE\_NOT\_FOUND (Ali Ijaz Sheikh)
      [#25690](#25690)
    * requireStack property for MODULE\_NOT\_FOUND (Ali Ijaz Sheikh)
      [#25690](#25690)
    * remove dead code (Ruben Bridgewater)
      [#26983](#26983)
    * make `require('.')` never resolve outside the current directory
      (Ruben Bridgewater)
      [#26973](#26973)
    * throw an error for invalid package.json main entries
      (Ruben Bridgewater)
      [#26823](#26823)
    * don't search in `require.resolve.paths` (cjihrig)
      [#23683](#23683)
* net:
    * remove `Server.listenFD()` (cjihrig)
      [#27127](#27127)
    * do not add `.host` and `.port` properties to DNS error
      (Ruben Bridgewater)
      [#26751](#26751)
    * emit "write after end" errors in the next tick (Ouyang Yadong)
      [#24457](#24457)
    * deprecate `_setSimultaneousAccepts()` undocumented function
      (James M Snell)
      [#23760](#23760)
* os:
    * implement `os.type()` using `uv_os_uname()` (cjihrig)
      [#25659](#25659)
    * remove `os.getNetworkInterfaces()` (cjihrig)
      [#25280](#25280)
* process:
    * make global.process, global.Buffer getters (Guy Bedford)
      [#26882](#26882)
    * move DEP0062 (node --debug) to end-of-life (Joyee Cheung)
      [#25828](#25828)
    * exit on --debug and --debug-brk after option parsing
      (Joyee Cheung)
      [#25828](#25828)
    * improve `--redirect-warnings` handling (Ruben Bridgewater)
      [#24965](#24965)
* readline:
    * support TERM=dumb (Vladislav Kaminsky)
      [#26261](#26261)
* repl:
    * add welcome message (gengjiawen)
      [#25947](#25947)
    * fix terminal default setting (Ruben Bridgewater)
      [#26518](#26518)
    * check colors with `.getColorDepth()` (Vladislav Kaminsky)
      [#26261](#26261)
    * deprecate REPLServer.rli (Ruben Bridgewater)
      [#26260](#26260)
* src:
    * remove unused `INT_MAX` constant (Sam Roberts)
      [#27078](#27078)
    * update `NODE_MODULE_VERSION` to 72 (Ujjwal Sharma)
      [#26685](#26685)
    * remove `AddPromiseHook()` (Anna Henningsen)
      [#26574](#26574)
    * clean up `MultiIsolatePlatform` interface (Anna Henningsen)
      [#26384](#26384)
    * properly configure default heap limits (Ali Ijaz Sheikh)
      [#25576](#25576)
    * remove `icuDataDir` from node config (GauthamBanasandra)
      [#24780](#24780)
* tls:
    * support TLSv1.3 (Sam Roberts)
      [#26209](#26209)
    * return correct version from `getCipher()` (Sam Roberts)
      [#26625](#26625)
    * check arg types of renegotiate() (Sam Roberts)
      [#25876](#25876)
    * add code for `ERR_TLS_INVALID_PROTOCOL_METHOD` (Sam Roberts)
      [#24729](#24729)
    * emit a warning when servername is an IP address (Rodger Combs)
      [#23329](#23329)
    * disable TLS v1.0 and v1.1 by default (Ben Noordhuis)
      [#23814](#23814)
    * remove unused arg to createSecureContext() (Sam Roberts)
      [#24241](#24241)
    * deprecate `Server.prototype.setOptions()` (cjihrig)
      [#23820](#23820)
    * load `NODE_EXTRA_CA_CERTS` at startup (Ouyang Yadong)
      [#23354](#23354)
* util:
    * remove `util.print()`, `util.puts()`, `util.debug()`
      and `util.error()` (cjihrig)
      [#25377](#25377)
    * change inspect compact and breakLength default
      (Ruben Bridgewater)
      [#27109](#27109)
    * improve inspect edge cases (Ruben Bridgewater)
      [#27109](#27109)
    * only the first line of the error message (Simon Zünd)
      [#26685](#26685)
    * don't set the prototype of callbackified functions
      (Ruben Bridgewater)
      [#26893](#26893)
    * rename callbackified function (Ruben Bridgewater)
      [#26893](#26893)
    * increase function length when using `callbackify()`
      (Ruben Bridgewater)
      [#26893](#26893)
    * prevent tampering with internals in `inspect()`
      (Ruben Bridgewater)
      [#26577](#26577)
    * prevent Proxy traps being triggered by `.inspect()`
      (Ruben Bridgewater)
      [#26241](#26241)
    * prevent leaking internal properties (Ruben Bridgewater)
      [#24971](#24971)
    * protect against monkeypatched Object prototype for inspect()
      (Rich Trott)
      [#25953](#25953)
    * treat format arguments equally (Roman Reiss)
      [#23162](#23162)
* win, fs:
    * detect if symlink target is a directory (Bartosz Sosnowski)
      [#23724](#23724)
* zlib:
    * throw TypeError if callback is missing (Anna Henningsen)
      [#24929](#24929)
    * make “bare” constants un-enumerable (Anna Henningsen)
      [#24824](#24824)

PR-URL: #26930
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