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https://issues.apache.org/jira/browse/FLINK-13417?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16922970#comment-16922970
 ] 

TisonKun commented on FLINK-13417:
----------------------------------

Yes [~till.rohrmann]. I locally build with zk 3.5 and no compile error reported 
while I fired CI it passed almost builds, see also

https://travis-ci.org/TisonKun/flink/builds/580757901

which reported failures on {{HBaseConnectorITCase}} when started HBase 
MiniCluster when started MiniZooKeeperCluster. It seems like a problem of 
testing class implementation.

Maybe [~carp84] can provide some inputs here.


{code:java}
java.io.IOException: Waiting for startup of standalone server

        at 
org.apache.hadoop.hbase.zookeeper.MiniZooKeeperCluster.startup(MiniZooKeeperCluster.java:261)
        at 
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniZKCluster(HBaseTestingUtility.java:814)
        at 
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniZKCluster(HBaseTestingUtility.java:784)
        at 
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster(HBaseTestingUtility.java:1041)
        at 
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster(HBaseTestingUtility.java:917)
        at 
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster(HBaseTestingUtility.java:899)
        at 
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster(HBaseTestingUtility.java:881)
        at 
org.apache.flink.addons.hbase.util.HBaseTestingClusterAutoStarter.setUp(HBaseTestingClusterAutoStarter.java:147)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
        at 
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
        at 
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
        at 
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
        at 
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
        at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
        at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
        at org.junit.rules.RunRules.evaluate(RunRules.java:20)
        at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
        at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
        at 
com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
        at 
com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
        at 
com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
        at 
com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
{code}


> Bump Zookeeper to 3.5.5
> -----------------------
>
>                 Key: FLINK-13417
>                 URL: https://issues.apache.org/jira/browse/FLINK-13417
>             Project: Flink
>          Issue Type: Improvement
>          Components: Runtime / Coordination
>    Affects Versions: 1.9.0
>            Reporter: Konstantin Knauf
>            Priority: Blocker
>             Fix For: 1.10.0
>
>
> User might want to secure their Zookeeper connection via SSL.
> This requires a Zookeeper version >= 3.5.1. We might as well try to bump it 
> to 3.5.5, which is the latest version. 



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