Major Description
Reported by a forum user - see https://forums.couchbase.com/t/service-memcached-exited-with-status-134-restarting/10759/
Following exception was thrown:
memcached<0.76.0>: terminate called after throwing an instance of 'std::runtime_error'
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memcached<0.76.0>: what(): Couchbase::Crypto::HMAC(SHA512): HMAC failed
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I've extracted the backtrace from the minidump file:
#0 0x00007fdf2d626418 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54
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#1 0x00007fdf2d62801a in __GI_abort () at abort.c:89
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#2 0x00007fdf2dc5f84d in __gnu_cxx::__verbose_terminate_handler () at ../../../../src/libstdc++-v3/libsupc++/vterminate.cc:95
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#3 0x0000000000427fcf in backtrace_terminate_handler () at /home/couchbase/jenkins/workspace/watson-unix/memcached/utilities/terminate_handler.cc:63
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#4 0x00007fdf2dc5d6b6 in __cxxabiv1::__terminate (handler=<optimised out>) at ../../../../src/libstdc++-v3/libsupc++/eh_terminate.cc:47
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#5 0x00007fdf2dc5d701 in std::terminate () at ../../../../src/libstdc++-v3/libsupc++/eh_terminate.cc:57
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#6 0x00007fdf2dc5d919 in __cxxabiv1::__cxa_throw (obj=0x7fdf2c8b1ea0, tinfo=0x68b110 <typeinfo for std::runtime_error>, dest=0x40c420 <std::runtime_error::~runtime_error()@plt>)
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at ../../../../src/libstdc++-v3/libsupc++/eh_throw.cc:87
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#7 0x00007fdf2f6dba51 in HMAC_SHA512 (data=<error reading variable: Cannot access memory at address 0x8>, key=std::vector of length 989083944, capacity -140595512139582 = {...})
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at /home/couchbase/jenkins/workspace/watson-unix/memcached/cbsasl/cbcrypto.cc:188
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#8 Couchbase::Crypto::HMAC (algorithm=<optimised out>, key=std::vector of length 0, capacity 0, data=std::vector of length 10, capacity 10 = {...})
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at /home/couchbase/jenkins/workspace/watson-unix/memcached/cbsasl/cbcrypto.cc:311
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#9 0x00007fdf2f6ea1dc in ScramShaBackend::getServerSignature (this=this@entry=0x7fdf0727b620) at /home/couchbase/jenkins/workspace/watson-unix/memcached/cbsasl/scram-sha/scram-sha.cc:227
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#10 0x00007fdf2f6ecd61 in ScramShaServerBackend::step (this=0x7fdf0727b620, conn=0x7fdef0c3c9a0, input=<optimised out>, inputlen=<optimised out>, output=0x7fdef01c6670, outputlen=0x7fdef01c6678)
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at /home/couchbase/jenkins/workspace/watson-unix/memcached/cbsasl/scram-sha/scram-sha.cc:463
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#11 0x000000000044c1a0 in StepSaslAuthTask::execute (this=0x7fdef01c6618) at /home/couchbase/jenkins/workspace/watson-unix/memcached/daemon/sasl_tasks.cc:49
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#12 0x00000000004394f2 in Executor::run (this=0x7fdf2c84f200) at /home/couchbase/jenkins/workspace/watson-unix/memcached/daemon/executor.cc:60
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#13 0x00007fdf2f0c1c8b in Couchbase::Thread::thread_entry (this=0x7fdf2c84f200) at /home/couchbase/jenkins/workspace/watson-unix/platform/src/thread.cc:46
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#14 0x00007fdf2f0bd84a in CouchbaseThread::run (this=0x7fdf2c8ce020) at /home/couchbase/jenkins/workspace/watson-unix/platform/src/cb_pthreads.cc:54
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#15 platform_thread_wrap (arg=0x7fdf2c8ce020) at /home/couchbase/jenkins/workspace/watson-unix/platform/src/cb_pthreads.cc:66
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#16 0x00007fdf2eea26fa in start_thread (arg=0x7fdf21df8700) at pthread_create.c:333
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#17 0x00007fdf2d6f7b5d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
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From the memcached log the exception is thrown just after a Java SDK client HELLOs:
2016-11-10T14:50:09.447388-08:00 NOTICE 67: HELO [couchbase-java-client/2.2.6 (git: 2.2.6, core: 1.2.7) (Linux/4.4.0-36-generic amd64; OpenJDK 64-Bit Server VM 1.8.0_91-8u91-b14-3ubuntu1~16.04.1-b14)] TCP NODELAY [ 192.168.2.1
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11:46372 - 192.168.2.109:11210 ]
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2016-11-10T14:50:09.485189-08:00 NOTICE 69: HELO [couchbase-java-client/2.2.6 (git: 2.2.6, core: 1.2.7) (Linux/4.4.0-36-generic amd64; OpenJDK 64-Bit Server VM 1.8.0_91-8u91-b14-3ubuntu1~16.04.1-b14)] TCP NODELAY [ 192.168.2.1
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11:46376 - 192.168.2.109:11210 ]
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2016-11-10T14:50:09.660840-08:00 WARNING Breakpad caught crash in memcached. Writing crash dump to /opt/couchbase/var/lib/couchbase/crash/1e4a92b9-e350-b8d2-67b966ba-1b89a355.dmp before terminating.
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