https://community.cloudera.com/t5/Support-Questions/ZOOKEEPER-CHECK-FAILED/m-p/242434#M204235 <P>Hello ,<BR /><BR />My zookeeper is working good on my 4 nodes. but when i start a checking it failed and i got this error on my stderr:</P><P><BR /></P><PRE>Traceback (most recent call last): &nbsp; File "/usr/lib/ambari-agent/lib/resource_management/core/shell.py", line 150, in _call_wrapper &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;result = _call(command, **kwargs_copy) &nbsp; File "/usr/lib/ambari-agent/lib/resource_management/core/shell.py", line 314, in _call &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;raise ExecutionFailed(err_msg, code, out, err)&nbsp; ExecutionFailed: Execution of '/var/lib/ambari-agent/tmp/zkSmoke.sh /usr/hdp/current/zookeeper-client/bin/zkCli.sh ambari-qa /usr/hdp/current/zookeeper-client/conf 2181 False kinit no_keytab no_principal /var/lib/ambari-agent/tmp/zkSmoke.out' returned 4. zk_node1=master.rh.bigdata.cluster&nbsp; log4j:WARN No appenders could be found for logger (org.apache.zookeeper.ZooKeeper).&nbsp; log4j:WARN Please initialize the log4j system properly.&nbsp; log4j:WARN See <A href="http://logging.apache.org/log4j/1.2/faq.html#noconfig" target="_blank">http://logging.apache.org/log4j/1.2/faq.html#noconfig</A> for more info.&nbsp; Exception in thread "main" org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss for /zk_smoketest &nbsp; &nbsp;&nbsp; &nbsp; &nbsp;&nbsp;at org.apache.zookeeper.KeeperException.create(KeeperException.java:99) &nbsp; &nbsp;&nbsp; &nbsp; &nbsp;&nbsp;at org.apache.zookeeper.KeeperException.create(KeeperException.java:51) &nbsp; &nbsp;&nbsp; &nbsp; &nbsp;&nbsp;at org.apache.zookeeper.ZooKeeper.delete(ZooKeeper.java:873) &nbsp; &nbsp;&nbsp; &nbsp; &nbsp;&nbsp;at org.apache.zookeeper.ZooKeeperMain.processZKCmd(ZooKeeperMain.java:708) &nbsp; &nbsp;&nbsp; &nbsp; &nbsp;&nbsp;at org.apache.zookeeper.ZooKeeperMain.processCmd(ZooKeeperMain.java:596) &nbsp; &nbsp;&nbsp; &nbsp; &nbsp;&nbsp;at org.apache.zookeeper.ZooKeeperMain.executeLine(ZooKeeperMain.java:368) &nbsp; &nbsp;&nbsp; &nbsp; &nbsp;&nbsp;at org.apache.zookeeper.ZooKeeperMain.run(ZooKeeperMain.java:328) &nbsp; &nbsp;&nbsp; &nbsp; &nbsp; at org.apache.zookeeper.ZooKeeperMain.main(ZooKeeperMain.java:287)</PRE><P><BR /></P><P>I also belive that this issue affect other services ! </P> Fri, 14 Jun 2019 00:47:06 GMT adil_bakkouri_g 2019-06-14T00:47:06Z