Possible bug in AWS environment

[archasek]

Hi, I'm getting this error:

APP      | 2017-06-28 18:47: Server error: SyntaxError: Unexpected end of JSON input
APP      |     at JSON.parse (<anonymous>)
APP      |     at MemcachedStore.decryptData (/var/myapp/node_modules/connect-memcached/lib/connect-memcached.j s:180:27)
APP      |     at Object.callback (/var/myapp/node_modules/connect-memcached/lib/connect-memcached.js:85:52)
APP      |     at Client.memcached.delegateCallback (/var/myapp/node_modules/memcached/lib/memcached.js:687:12)
APP      |     at Client.rawDataReceived (/var/myapp/node_modules/memcached/lib/memcached.js:758:22)
APP      |     at Client.BufferBuffer (/var/myapp/node_modules/memcached/lib/memcached.js:678:12)
APP      |     at Socket.bowlofcurry (/var/myapp/node_modules/memcached/lib/utils.js:126:15)
APP      |     at emitOne (events.js:115:13)
APP      |     at Socket.emit (events.js:210:7)
APP      |     at addChunk (_stream_readable.js:252:12)
APP      |     at readableAddChunk (_stream_readable.js:235:13)
APP      |     at Socket.Readable.push (_stream_readable.js:197:10)
APP      |     at TCP.onread (net.js:588:20)

I added a console.log to the line 180 of lib/memcached.js and I got this:

APP      | 2017-06-28 18:50: 2323 '{"ct":"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'
APP      | 2017-06-28 18:50: Server error: SyntaxError: Unexpected end of JSON input
APP      |     at JSON.parse (<anonymous>)
APP      |     at MemcachedStore.decryptData (/var/myapp/n
(...)

I suppose that this is somehow connected with AWS (Memcache in RDS), when I run my app locally, nothing's wrong.

@balor do you have any idea how to work it around?

Thanks

[archasek]

I decided to move to the https://github.com/liamdon/connect-memjs

[balor]

Hi there!
@archasek Could you post some more info about the memcached configuration? Are you using Memcached bundled with MySQL RDS or ElastiCache?

[archasek]

@balor hi :)
Memcached bundled with MySQL RDS at the moment

[balor]

To be honest I didn't used this RDS configuration, could you post the memcached settings?

[archasek]

Here you go:

STAT maxbytes 67108864
STAT maxconns 1024
STAT tcpport 11211
STAT udpport 11211
STAT inter NULL
STAT verbosity 1
STAT oldest 0
STAT evictions on
STAT domain_socket NULL
STAT umask 700
STAT growth_factor 1.25
STAT chunk_size 48
STAT num_threads 4
STAT num_threads_per_udp 0
STAT stat_key_prefix :
STAT detail_enabled no
STAT allow_detailed yes
STAT reqs_per_event 20
STAT reqs_per_tap_event 50
STAT cas_enabled yes
STAT tcp_backlog 1024
STAT binding_protocol auto-negotiate
STAT auth_enabled_sasl no
STAT auth_sasl_engine none
STAT auth_required_sasl no
STAT item_size_max 1048576
STAT topkeys 0
STAT logger standard error
END

item_size_max 1048576 something with this setting?

[balor]

The item_size_max 1048576 means that you can store max 1MB of session store (encrypted), which is the default option for memcached and shouldn't be a problem itself. Do the use of memjs solved the case?

[jas-]

@archasek The encrypted object has been truncated. Can you confirm the contents on save?

[archasek]

@jas-, thanks for asking, but it's been like 2.5 years since I asked my question - I have no chance to confirm this :-). Cheers

[jas-]

@archasek ok, sorry I am just now seeing this. I thought I was watching this repo in order to help @balor support the functionality

[balor]

Due to insufficient debug data I'm closing this issue.