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https://issues.apache.org/jira/browse/YARN-4348?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15005722#comment-15005722
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Tsuyoshi Ozawa commented on YARN-4348:
--------------------------------------

Found that testZKRootPathAcls fails because of time out with the patch. I will 
check it more deeper.

{code:title=TestZKRMStateStore-output.txt|}
2015-11-15 02:15:17,324 INFO  [main] zookeeper.JUnit4ZKTestRunner 
(JUnit4ZKTestRunner.java:evaluate(50)) - RUNNING TEST METHOD testZKRootPathAcls
... ...
2015-11-15 02:30:12,774 DEBUG [SyncThread:0] server.FinalRequestProcessor 
(FinalRequestProcessor.java:processRequest(88)) - Processing request:: 
sessionid:0x15108ecd3b20001 type:ping cxid:0xfffffffffffffffe 
zxid:0xfffffffffffffffe txntype:unknown reqpath:n/a
2015-11-15 02:30:12,774 DEBUG [SyncThread:0] server.FinalRequestProcessor 
(FinalRequestProcessor.java:processRequest(160)) - sessionid:0x15108ecd3b20001 
type:ping cxid:0xfffffffffffffffe zxid:0xfffffffffffffffe txntype:unknown 
reqpath:n/a
2015-11-15 02:30:12,775 DEBUG [main-SendThread(127.0.0.1:11221)] 
zookeeper.ClientCnxn (ClientCnxn.java:readResponse(717)) - Got ping response 
for sessionid: 0x15108ecd3b20001 after 0ms
2015-11-15 02:30:14,776 DEBUG [SyncThread:0] server.FinalRequestProcessor 
(FinalRequestProcessor.java:processRequest(88)) - Processing request:: 
sessionid:0x15108ecd3b20001 type:ping cxid:0xfffffffffffffffe 
zxid:0xfffffffffffffffe txntype:unknown reqpath:n/a
2015-11-15 02:30:14,776 DEBUG [SyncThread:0] server.FinalRequestProcessor 
(FinalRequestProcessor.java:processRequest(160)) - sessionid:0x15108ecd3b20001 
type:ping cxid:0xfffffffffffffffe zxid:0xfffffffffffffffe txntype:unknown 
reqpath:n/a
2015-11-15 02:30:14,776 DEBUG [main-SendThread(127.0.0.1:11221)] 
zookeeper.ClientCnxn (ClientCnxn.java:readResponse(717)) - Got ping response 
for sessionid: 0x15108ecd3b20001 after 0ms
~                            
{code}

> ZKRMStateStore.syncInternal should wait for zkResyncWaitTime instead of 
> zkSessionTimeout
> ----------------------------------------------------------------------------------------
>
>                 Key: YARN-4348
>                 URL: https://issues.apache.org/jira/browse/YARN-4348
>             Project: Hadoop YARN
>          Issue Type: Bug
>    Affects Versions: 2.7.2, 2.6.2
>            Reporter: Tsuyoshi Ozawa
>            Assignee: Tsuyoshi Ozawa
>         Attachments: YARN-4348.001.patch, YARN-4348.001.patch, log.txt
>
>
> Jian mentioned that the current internal ZK configuration of ZKRMStateStore 
> can cause a following situation:
> 1. syncInternal timeouts, 
> 2. but sync succeeded later on.
> We should use zkResyncWaitTime as the timeout value.



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