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GapInStream(memcache) exception. #1162

dkvk opened this issue Mar 15, 2016 · 4 comments


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commented Mar 15, 2016

For confirmed bugs, please report:

  • Version: packetbeat version 1.1.1 (amd64)
  • Operating System: Ubuntu
  • Steps to Reproduce: I believe the issue is due to the high volume of packets that memcache is producing. Commenting out and disable the memcached protocol makes the issue dissapears.
Mar 15 23:41:48 vps-53498 /usr/bin/packetbeat[4313]: log.go:113: GapInStream(memcache) exception. Recovering, but please report this: runtime error: invalid memory address or nil pointer dereference.
Mar 15 23:41:48 vps-53498 /usr/bin/packetbeat[4313]: log.go:114: Stacktrace: /go/src/ (0x4aa716)#012/usr/local/go/src/runtime/asm_amd64.s:437 (0x4621ee)#012/usr/local/go/src/runtime/panic.go:423 (0x4307c9)#012/usr/local/go/src/runtime/panic.go:42 (0x42ee89)#012/usr/local/go/src/runtime/sigpanic_unix.go:24 (0x44589a)#012/go/src/ (0x4de83d)#012/go/src/ (0x51172d)#012/go/src/ (0x511f3c)#012/go/src/ (0x6f80a7)#012/go/src/ (0x6f75e1)#012/go/src/ (0x526299)#012/go/src/ (0x4676fb)#012/usr/local/go/src/runtime/asm_amd64.s:1721 (0x464561)

@urso urso self-assigned this Mar 21, 2016

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commented Mar 21, 2016

Thanks for reporting. Indeed, this one is triggered by packet loss.

In general the error is not 'that critical' in a sense it does not break processing. GapInStream will check if the current buffered message can still be processed somehow (even on packet loss), but drops the TCP connection afterwards. Generating the panic enforces the TCP connection being dropped.


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commented Mar 31, 2016

i can see that with the latest (packetbeat version 1.2.0 (amd64)) as well

Mar 31 13:29:15 d031-uk /usr/bin/packetbeat[32523]: log.go:114: Stacktrace: /go/src/ (0x4c5a66)#012/usr/local/go/src/runtime/asm_amd64.s:437 (0x47c88e)#012/usr/local/go/src/runtime/panic.go:423 (0x44b119)#012/usr/local/go/src/runtime/panic.go:42 (0x4497d9)#012/usr/local/go/src/runtime/sigpanic_unix.go:24 (0x46024a)#012/go/src/ (0x4f9b7d)#012/go/src/ (0x52cc6d)#012/go/src/ (0x52d47c)#012/go/src/ (0x713787)#012/go/src/ (0x712cc1)#012/go/src/ (0x5417c9)#012/go/src/ (0x481d4b)#012/usr/local/go/src/runtime/asm_amd64.s:1696 (0x47ebd1)

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commented Jun 14, 2016

I've the same problem but in my case this errors collapsed the space on my machines, saturates the system logs.


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commented Jun 14, 2016

I've the packetbeat version 1.2.3 on ubuntu server

@ruflin ruflin closed this in #1840 Jun 14, 2016
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