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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-18541) [C++] Segfaults from JNI
Date Mon, 14 Aug 2017 15:45:01 GMT

    [ https://issues.apache.org/jira/browse/HBASE-18541?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16125850#comment-16125850

Ted Yu commented on HBASE-18541:

Installed openjdk-8-dbg
When loading core dump in gdb, I got:
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
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  0x00007f1a735338d5 in ?? ()
[Current thread is 1 (Thread 0x7f1a8701d840 (LWP 12922))]
Installing openjdk unwinder
(gdb) bt
#0  0x00007f1a735338d5 in  ()
#1  0x00007ffe78f88ba8 in  ()
#2  0x00007f19e4d572c8 in  ()
#3  0x0000000000000000 in  ()
There was no detail for the seg fault.

> [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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