panic: runtime error: invalid memory address or nil pointer dereference

[jonc650]

I currently get the following error on both OSX and Linux for all commands:

panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xb code=0x1 addr=0x1 pc=0x80e7fbc]

goroutine 1 [running]:
runtime.panic(0x8691a20, 0x9584c28)
/usr/lib/golang/src/pkg/runtime/panic.c:266 +0xac
sync/atomic.AddUint64(0x1982eb44, 0x1, 0x0, 0x1980a5e0, 0x0)
/usr/lib/golang/src/pkg/sync/atomic/asm_386.s:118 +0xc
github.com/vmware/govmomi/vim25/soap.(_Client).RoundTrip(0x1982eaf0, 0xb78941a0, 0x1980a5d0, 0xb78941a0, 0x1980a5e0, ...)
/workspace/src/github.com/vmware/govmomi/vim25/soap/client.go:127 +0x11b
github.com/vmware/govmomi/vim25/methods.RetrieveServiceContent(0xb7894188, 0x1982eaf0, 0x1980a5c0, 0x9588790, 0x1, ...)
/workspace/src/github.com/vmware/govmomi/vim25/methods/methods.go:9657 +0x99
github.com/vmware/govmomi.serviceContent(0xb7894188, 0x1982eaf0, 0x9587e70, 0xb7894188, 0x1981cee0, ...)
/workspace/src/github.com/vmware/govmomi/client.go:43 +0x8b
github.com/vmware/govmomi.NewClient(0xbfd5a89f, 0x5, 0x0, 0x0, 0x1981cee0, ...)
/workspace/src/github.com/vmware/govmomi/client.go:79 +0xbe
github.com/vmware/govmomi/govc/flags.(_ClientFlag).newClient(0x1981ce80, 0x0, 0x0, 0x0)
/workspace/src/github.com/vmware/govmomi/govc/flags/client.go:141 +0x61
github.com/vmware/govmomi/govc/flags.(_ClientFlag).Client(0x1981ce80, 0x19800680, 0x196, 0x198a34a4)
/workspace/src/github.com/vmware/govmomi/govc/flags/client.go:207 +0xcf
github.com/vmware/govmomi/govc/about.(_about).Run(0x19800680, 0x198a3680, 0x0, 0x0)
/workspace/src/github.com/vmware/govmomi/govc/about/command.go:42 +0x3a
github.com/vmware/govmomi/govc/cli.Run(0x1980a008, 0x1, 0x1, 0x19800680)
/workspace/src/github.com/vmware/govmomi/govc/cli/command.go:151 +0x4f2
main.main()
/workspace/src/github.com/vmware/govmomi/govc/main.go:42 +0x54

An strace show's it having issues with the session file not existing.

clock_gettime(CLOCK_REALTIME, {1413556864, 473082132}) = 0
open("/root/.govmomi/sessions/myuser@myesxhost.com?insecure=true", O_RDONLY|O_LARGEFILE|O_CLOEXEC) = -1 ENOENT (No such file or directory)
clock_gettime(CLOCK_REALTIME, {1413556864, 474050323}) = 0
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
rt_sigreturn(0x198010a0) = 140738048
write(2, "panic: ", 7panic: ) = 7
write(2, "runtime error: invalid memory ad"..., 64runtime error: invalid memory address or nil pointer dereference) = 64

/root/.govmomi/sessions/ didn't exist, so I created it, but still get the same error.

[jonc650]

I've been a bit hasty with the above - this is probably due to us using vsphere 5. I'll close this, and you can add vSphere 5.0.0 to your incompatible list!

[dougm]

@jonc650 I was able to reproduce this issue, fix is in #142 - can you give it a try? Thanks.

[jonc650]

I've just updated to the latest, but I still see the same issue.

[dougm]

I should have looked closer at your stack trace.. looks like you are using 32-bit go and we were bitten by this issue: https://code.google.com/p/go/issues/detail?id=6404

I did reproduce with 32-bit go. Can you try updating again to include #143 ?

[jonc650]

That seems to have fixed this issue - Thanks. I'm not yet getting a valid response back from 'about', but that's more likely to be something I'm not doing right or a problem due to versions than an issue!

govc about
Error: expected element type but have

Thanks

Jon

[pietern]

Hi @jonc650, I think a version incompatibility is the most likely here. Any chance you can upgrade to 5.5?

[dougm]

Works for me against ESX 5.0 - @jonc650 does your url point directly to an ESX box or vCenter? You can try: govc about -debug ... and have a look at ~/.govmomi/debug//.res.xml to see the response. In your case, the error happens when trying to unmarshal the response:

vim25/xml/read.go: e := "expected element <" + finfo.name + "> in name space " + finfo.xmlns + " but have "

% govc about
Name: VMware ESXi
Vendor: VMware, Inc.
Version: 5.0.0
Build: 1243428
OS type: vmnix-x86
API type: HostAgent
API version: 5.0
Product ID: embeddedEsx
UUID:

[jonc650]

Hello

This is using vCenter. Strangely I randomly started getting a cert error instead of the above yesterday, and when I added -k=true I got a result, so it must have been something to do with our infrastructure at the time. I don't look after the VMware infrastructure, I just need to extract info from it as a sysadmin. There is the possibility we will be upgrading next year, but until then it now seems to work. Thanks for your help with this.

Jon