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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-18541) [C++] Segfaults from JNI
Date Sat, 12 Aug 2017 08:36:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-18541?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16124523#comment-16124523
] 

Ted Yu commented on HBASE-18541:
--------------------------------

Managed to generate core dump where:
{code}
Core was generated by `/usr/src/hbase/hbase-native-client/buck-out/gen/core/retry-test --gtest_color=n'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007fe32bc33135 in ?? () from /usr/lib/jvm/java-8-openjdk-amd64//jre/lib/amd64/server/libjvm.so
[Current thread is 1 (Thread 0x7fe32c343840 (LWP 19436))]
(gdb) bt
#0  0x00007fe32bc33135 in ?? () from /usr/lib/jvm/java-8-openjdk-amd64//jre/lib/amd64/server/libjvm.so
#1  0x00007fe31885053e in ?? ()
#2  0x00000000e0d55920 in ?? ()
#3  0x00000000fefd3110 in ?? ()
#4  0x00007ffdd7ce7210 in ?? ()
#5  0x00007fe32b66dfed in ?? () from /usr/lib/jvm/java-8-openjdk-amd64//jre/lib/amd64/server/libjvm.so
#6  0x00007fe318282b10 in ?? ()
#7  0x00000000029426a0 in ?? ()
#8  0x00007fe318282b10 in ?? ()
#9  0x0000000000000010 in ?? ()
#10 0x00007fe32b4b32fd in ?? () from /usr/lib/jvm/java-8-openjdk-amd64//jre/lib/amd64/server/libjvm.so
#11 0x00007fe318282b10 in ?? ()
#12 0x0000000000000010 in ?? ()
#13 0x00007fe31840c5c8 in ?? ()
#14 0x00000000fefd3110 in ?? ()
{code}
there was no method from native client shown above.

> [C++] Segfaults from JNI
> ------------------------
>
>                 Key: HBASE-18541
>                 URL: https://issues.apache.org/jira/browse/HBASE-18541
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Enis Soztutar
>            Assignee: Ted Yu
>
> retry-test and multi-retry-test fails flakily when run with 
> {code}
> buck test --all --no-results-cache
> {code}
> or when run in a loop:
> {code}
> for i in `seq 1 10`; do buck test --no-results-cache core:retry-test || break 1; done
> {code}
> The problem seems to be within the JNI internals and usually happens at the create table
method call. I was not able to inspect much, but the comments in our mini-cluster indicate
that we may need to use global references instead of local ones. I suspect the problem happens
when there is a GC run for the test since the failure happens usually after some time (but
almost always in create table method). 
> [~ted_yu] do you mind taking a look at this. 



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