Caroline Liu created KAFKA-8508:
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Summary: saslClient failed to initialize properly: it's null.
Key: KAFKA-8508
URL: https://issues.apache.org/jira/browse/KAFKA-8508
Project: Kafka
Issue Type: Bug
Components: zkclient
Affects Versions: 2.0.1
Reporter: Caroline Liu
After a network issue caused the last ISR to fail connecting to ZooKeeper, the
attempt to reconnect failed with an ArrayIndexOutOfBoundsException.
{code:java}
2019-05-31 15:54:38,823 [zk-session-expiry-handler0-SendThread(zk2-1:2181)]
WARN (org.apache.zookeeper.ClientCnxn) - Client session timed out, have not
heard from server in 20010ms for sessionid 0x15000011b2b1042a
2019-05-31 15:54:38,823 [zk-session-expiry-handler0-SendThread(zk2-1:2181)]
INFO (org.apache.zookeeper.ClientCnxn) - Client session timed out, have not
heard from server in 20010ms for sessionid 0x15000011b2b1042a, closing socket
connection and attempting reconnect
2019-05-31 15:54:39,702 [zk-session-expiry-handler0-SendThread(zk1-2:2181)]
INFO (org.apache.zookeeper.client.ZooKeeperSaslClient) - Client will use
DIGEST-MD5 as SASL mechanism.
2019-05-31 15:54:39,702 [zk-session-expiry-handler0-SendThread(zk1-2:2181)]
ERROR (org.apache.zookeeper.client.ZooKeeperSaslClient) - Exception while
trying to create SASL client: java.lang.ArrayIndexOutOfBoundsException: 0
2019-05-31 15:54:39,702 [zk-session-expiry-handler0-SendThread(zk1-2:2181)]
INFO (org.apache.zookeeper.ClientCnxn) - Opening socket connection to server
zk1-2/1.3.6.1:2181. Will attempt to SASL-authenticate using Login Context
section 'Client'
2019-05-31 15:54:39,702 [zk-session-expiry-handler0-SendThread(zk1-2:2181)]
INFO (org.apache.zookeeper.ClientCnxn) - Socket connection established to
zk1-2/1.3.6.1:2181, initiating session
2019-05-31 15:54:39,703 [zk-session-expiry-handler0-SendThread(zk1-2:2181)]
INFO (org.apache.zookeeper.ClientCnxn) - Session establishment complete on
server zk1-2/1.3.6.1:2181, sessionid = 0x15000011b2b1042a, negotiated timeout =
30000
2019-05-31 15:54:39,703 [zk-session-expiry-handler0-SendThread(zk1-2:2181)]
ERROR (org.apache.zookeeper.ClientCnxn) - SASL authentication with Zookeeper
Quorum member failed: javax.security.sasl.SaslException: saslClient failed to
initialize properly: it's null.{code}
Kafka was "not live" in zookeeper and had to be manually restarted to recover
from this error. It would be better if the last ISR could retry.
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