See https://builds.apache.org/job/ZooKeeper_branch35_jdk7/1058/

###################################################################################
########################## LAST 60 LINES OF THE CONSOLE 
###########################
[...truncated 185.12 MB...]
    [junit] 2017-07-27 22:04:12,451 [myid:] - INFO  [ProcessThread(sid:0 
cport:19547)::PrepRequestProcessor@611] - Processed session termination for 
sessionid: 0x105b1469d4e0000
    [junit] 2017-07-27 22:04:12,452 [myid:] - INFO  
[SyncThread:0:MBeanRegistry@128] - Unregister MBean 
[org.apache.ZooKeeperService:name0=StandaloneServer_port19547,name1=Connections,name2=127.0.0.1,name3=0x105b1469d4e0000]
    [junit] 2017-07-27 22:04:12,452 [myid:] - INFO  [main:ZooKeeper@1331] - 
Session: 0x105b1469d4e0000 closed
    [junit] 2017-07-27 22:04:12,452 [myid:] - INFO  
[main-EventThread:ClientCnxn$EventThread@513] - EventThread shut down for 
session: 0x105b1469d4e0000
    [junit] 2017-07-27 22:04:12,452 [myid:] - INFO  
[main:JUnit4ZKTestRunner$LoggedInvokeMethod@82] - Memory used 221725
    [junit] 2017-07-27 22:04:12,453 [myid:] - INFO  
[main:JUnit4ZKTestRunner$LoggedInvokeMethod@87] - Number of threads 2431
    [junit] 2017-07-27 22:04:12,453 [myid:] - INFO  
[main:JUnit4ZKTestRunner$LoggedInvokeMethod@102] - FINISHED TEST METHOD 
testWatcherAutoResetWithLocal
    [junit] 2017-07-27 22:04:12,453 [myid:] - INFO  [main:ClientBase@586] - 
tearDown starting
    [junit] 2017-07-27 22:04:12,453 [myid:] - INFO  [main:ClientBase@556] - 
STOPPING server
    [junit] 2017-07-27 22:04:12,453 [myid:] - INFO  
[main:NettyServerCnxnFactory@464] - shutdown called 0.0.0.0/0.0.0.0:19547
    [junit] 2017-07-27 22:04:12,455 [myid:] - INFO  [main:ZooKeeperServer@541] 
- shutting down
    [junit] 2017-07-27 22:04:12,455 [myid:] - ERROR [main:ZooKeeperServer@505] 
- ZKShutdownHandler is not registered, so ZooKeeper server won't take any 
action on ERROR or SHUTDOWN server state changes
    [junit] 2017-07-27 22:04:12,455 [myid:] - INFO  
[main:SessionTrackerImpl@232] - Shutting down
    [junit] 2017-07-27 22:04:12,455 [myid:] - INFO  
[main:PrepRequestProcessor@1005] - Shutting down
    [junit] 2017-07-27 22:04:12,456 [myid:] - INFO  
[main:SyncRequestProcessor@191] - Shutting down
    [junit] 2017-07-27 22:04:12,456 [myid:] - INFO  [ProcessThread(sid:0 
cport:19547)::PrepRequestProcessor@155] - PrepRequestProcessor exited loop!
    [junit] 2017-07-27 22:04:12,456 [myid:] - INFO  
[SyncThread:0:SyncRequestProcessor@169] - SyncRequestProcessor exited!
    [junit] 2017-07-27 22:04:12,456 [myid:] - INFO  
[main:FinalRequestProcessor@481] - shutdown of request processor complete
    [junit] 2017-07-27 22:04:12,456 [myid:] - INFO  [main:MBeanRegistry@128] - 
Unregister MBean 
[org.apache.ZooKeeperService:name0=StandaloneServer_port19547,name1=InMemoryDataTree]
    [junit] 2017-07-27 22:04:12,456 [myid:] - INFO  [main:MBeanRegistry@128] - 
Unregister MBean [org.apache.ZooKeeperService:name0=StandaloneServer_port19547]
    [junit] 2017-07-27 22:04:12,457 [myid:] - INFO  
[main:FourLetterWordMain@85] - connecting to 127.0.0.1 19547
    [junit] 2017-07-27 22:04:12,457 [myid:] - INFO  [main:JMXEnv@146] - 
ensureOnly:[]
    [junit] 2017-07-27 22:04:12,464 [myid:] - INFO  [main:ClientBase@611] - 
fdcount after test is: 7158 at start it was 7158
    [junit] 2017-07-27 22:04:12,464 [myid:] - INFO  [main:ZKTestCase$1@68] - 
SUCCEEDED testWatcherAutoResetWithLocal
    [junit] 2017-07-27 22:04:12,464 [myid:] - INFO  [main:ZKTestCase$1@63] - 
FINISHED testWatcherAutoResetWithLocal
    [junit] Tests run: 103, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 
427.436 sec, Thread: 4, Class: org.apache.zookeeper.test.NioNettySuiteTest
    [junit] 2017-07-27 22:04:12,477 [myid:127.0.0.1:19350] - INFO  
[main-SendThread(127.0.0.1:19350):ClientCnxn$SendThread@1113] - Opening socket 
connection to server 127.0.0.1/127.0.0.1:19350. Will not attempt to 
authenticate using SASL (unknown error)
    [junit] 2017-07-27 22:04:12,478 [myid:127.0.0.1:19350] - WARN  
[main-SendThread(127.0.0.1:19350):ClientCnxn$SendThread@1235] - Session 
0x105b1407d8a0001 for server 127.0.0.1/127.0.0.1:19350, unexpected error, 
closing socket connection and attempting reconnect
    [junit] java.net.ConnectException: Connection refused
    [junit]     at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
    [junit]     at 
sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:744)
    [junit]     at 
org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:357)
    [junit]     at 
org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1214)
    [junit] 2017-07-27 22:04:12,550 [myid:127.0.0.1:19301] - INFO  
[main-SendThread(127.0.0.1:19301):ClientCnxn$SendThread@1113] - Opening socket 
connection to server 127.0.0.1/127.0.0.1:19301. Will not attempt to 
authenticate using SASL (unknown error)
    [junit] 2017-07-27 22:04:12,551 [myid:127.0.0.1:19301] - WARN  
[main-SendThread(127.0.0.1:19301):ClientCnxn$SendThread@1235] - Session 
0x105b140319e0000 for server 127.0.0.1/127.0.0.1:19301, unexpected error, 
closing socket connection and attempting reconnect
    [junit] java.net.ConnectException: Connection refused
    [junit]     at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
    [junit]     at 
sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:744)
    [junit]     at 
org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:357)
    [junit]     at 
org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1214)
    [junit] 2017-07-27 22:04:12,841 [myid:127.0.0.1:19430] - INFO  
[main-SendThread(127.0.0.1:19430):ClientCnxn$SendThread@1113] - Opening socket 
connection to server 127.0.0.1/127.0.0.1:19430. Will not attempt to 
authenticate using SASL (unknown error)
    [junit] 2017-07-27 22:04:12,842 [myid:127.0.0.1:19430] - WARN  
[main-SendThread(127.0.0.1:19430):ClientCnxn$SendThread@1235] - Session 
0x305b1433d410000 for server 127.0.0.1/127.0.0.1:19430, unexpected error, 
closing socket connection and attempting reconnect
    [junit] java.net.ConnectException: Connection refused
    [junit]     at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
    [junit]     at 
sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:744)
    [junit]     at 
org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:357)
    [junit]     at 
org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1214)

fail.build.on.test.failure:

BUILD FAILED
/home/jenkins/jenkins-slave/workspace/ZooKeeper_branch35_jdk7/build.xml:1225: 
The following error occurred while executing this line:
/home/jenkins/jenkins-slave/workspace/ZooKeeper_branch35_jdk7/build.xml:1229: 
Tests failed!

Total time: 10 minutes 19 seconds
Build step 'Invoke Ant' marked build as failure
Recording test results
Email was triggered for: Failure - Any
Sending email for trigger: Failure - Any



###################################################################################
############################## FAILED TESTS (if any) 
##############################
4 tests failed.
FAILED:  
org.apache.zookeeper.test.FollowerResyncConcurrencyTest.testFollowerSendsLastZxid

Error Message:
unable to create new native thread

Stack Trace:
java.lang.OutOfMemoryError: unable to create new native thread
        at java.lang.Thread.start0(Native Method)
        at java.lang.Thread.start(Thread.java:714)
        at 
org.apache.zookeeper.server.NIOServerCnxnFactory.start(NIOServerCnxnFactory.java:746)
        at 
org.apache.zookeeper.server.quorum.QuorumPeer.startServerCnxnFactory(QuorumPeer.java:1707)
        at 
org.apache.zookeeper.server.quorum.QuorumPeer.start(QuorumPeer.java:854)
        at org.apache.zookeeper.test.QuorumUtil.start(QuorumUtil.java:211)
        at org.apache.zookeeper.test.QuorumUtil.startAll(QuorumUtil.java:145)
        at 
org.apache.zookeeper.test.FollowerResyncConcurrencyTest.testFollowerSendsLastZxid(FollowerResyncConcurrencyTest.java:672)
        at 
org.apache.zookeeper.JUnit4ZKTestRunner$LoggedInvokeMethod.evaluate(JUnit4ZKTestRunner.java:79)


FAILED:  
org.apache.zookeeper.test.FollowerResyncConcurrencyTest.testResyncBySnapThenDiffAfterFollowerCrashes

Error Message:
unable to create new native thread

Stack Trace:
java.lang.OutOfMemoryError: unable to create new native thread
        at java.lang.Thread.start0(Native Method)
        at java.lang.Thread.start(Thread.java:714)
        at 
org.apache.zookeeper.server.quorum.QuorumPeer.start(QuorumPeer.java:862)
        at org.apache.zookeeper.test.QuorumUtil.start(QuorumUtil.java:211)
        at org.apache.zookeeper.test.QuorumUtil.startAll(QuorumUtil.java:145)
        at 
org.apache.zookeeper.test.FollowerResyncConcurrencyTest.followerResyncCrashTest(FollowerResyncConcurrencyTest.java:200)
        at 
org.apache.zookeeper.test.FollowerResyncConcurrencyTest.testResyncBySnapThenDiffAfterFollowerCrashes(FollowerResyncConcurrencyTest.java:176)
        at 
org.apache.zookeeper.JUnit4ZKTestRunner$LoggedInvokeMethod.evaluate(JUnit4ZKTestRunner.java:79)


FAILED:  
org.apache.zookeeper.test.FollowerResyncConcurrencyTest.testFollowerWatcherResync

Error Message:
unable to create new native thread

Stack Trace:
java.lang.OutOfMemoryError: unable to create new native thread
        at java.lang.Thread.start0(Native Method)
        at java.lang.Thread.start(Thread.java:714)
        at 
com.sun.jmx.remote.internal.ClientCommunicatorAdmin.<init>(ClientCommunicatorAdmin.java:45)
        at 
javax.management.remote.rmi.RMIConnector$RMIClientCommunicatorAdmin.<init>(RMIConnector.java:1467)
        at 
javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:339)
        at 
javax.management.remote.JMXConnectorFactory.connect(JMXConnectorFactory.java:268)
        at 
javax.management.remote.JMXConnectorFactory.connect(JMXConnectorFactory.java:227)
        at org.apache.zookeeper.test.JMXEnv.setUp(JMXEnv.java:58)
        at org.apache.zookeeper.test.QuorumUtil.<init>(QuorumUtil.java:90)
        at org.apache.zookeeper.test.QuorumUtil.<init>(QuorumUtil.java:127)
        at 
org.apache.zookeeper.test.FollowerResyncConcurrencyTest.testFollowerWatcherResync(FollowerResyncConcurrencyTest.java:713)
        at 
org.apache.zookeeper.JUnit4ZKTestRunner$LoggedInvokeMethod.evaluate(JUnit4ZKTestRunner.java:79)


FAILED:  org.apache.zookeeper.test.AsyncHammerTest.testObserversHammer

Error Message:
Java heap space

Stack Trace:
java.lang.OutOfMemoryError: Java heap space

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