Ted Yu commented on HBASE-18541:

2017-08-10 22:32:16,664 INFO  
[RpcServer.FifoWFPBQ.default.handler=28,queue=1,port=38871] master.HMaster 
(HMaster.java:createTable(1541)) - proc Id 9
2017-08-10 22:32:16,666 INFO  
[RpcServer.FifoWFPBQ.default.handler=28,queue=1,port=38871] master.HMaster 
(HMaster.java:createTable(1543)) - back from latch
2017-08-10 22:32:16,667 INFO  [ProcessThread(sid:0 cport:54578):] 
server.PrepRequestProcessor (PrepRequestProcessor.java:pRequest(651)) - Got 
user-level KeeperException when processing sessionid:0x15dce45d47c0000 
type:create cxid:0xb6 zxid:0x5b txntype:-1 reqpath:n/a Error 
Path:/hbase/table-lock/table6 Error:KeeperErrorCode = NoNode for 
Looks like the problem may have happened after table creation:
    LOG.info("back from latch");

> [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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