Can anyone help with the below issue... Thanks. -----Original Message----- From: Hema Bhatia [mailto:hema.bha...@apollo.edu] Sent: Tuesday, September 22, 2015 12:57 PM To: users@kafka.apache.org Subject: ZkClient throwing NPEs
Hi, I keep getting the below exception when Kafka tries to connect to zookeeper and zookeeper is momentarily not able to connect. After that, connection does not restore unless we restart the servers. This may be connected to this issue : https://issues.apache.org/jira/browse/KAFKA-824 But I am already using zkclient-0.5, and still seeing this issue. java.lang.NullPointerException: null at org.I0Itec.zkclient.ZkConnection.exists(ZkConnection.java:107) ~[zkclient-0.5.jar:0.5] at org.I0Itec.zkclient.ZkClient$3.call(ZkClient.java:631) ~[zkclient-0.5.jar:0.5] at org.I0Itec.zkclient.ZkClient$3.call(ZkClient.java:628) ~[zkclient-0.5.jar:0.5] at org.I0Itec.zkclient.ZkClient.retryUntilConnected(ZkClient.java:883) ~[zkclient-0.5.jar:0.5] at org.I0Itec.zkclient.ZkClient.exists(ZkClient.java:628) ~[zkclient-0.5.jar:0.5] at org.I0Itec.zkclient.ZkClient.exists(ZkClient.java:637) ~[zkclient-0.5.jar:0.5] at kafka.admin.AdminUtils$.topicExists(AdminUtils.scala:163) ~[kafka_2.10-0.8.2.0.jar:na] at kafka.admin.AdminUtils.topicExists(AdminUtils.scala) ~[kafka_2.10-0.8.2.0.jar:na] Any ideas of how to solve this issue? Thanks, Hema
