kafka broker failed to start post disable kerberos

[#1]

Team,

Post disabling kerberos kafka brokers failed to start with below error. I am using HDP 2.6 and ambari 2.6

Error:

[2018-02-13 04:44:11,112] FATAL Fatal error during KafkaServerStartable startup. Prepare to shutdown (kafka.server.KafkaServerStartable) java.lang.SecurityException: zookeeper.set.acl is true, but the verification of the JAAS login file failed. at kafka.server.KafkaServer.initZk(KafkaServer.scala:314) at kafka.server.KafkaServer.startup(KafkaServer.scala:200) at kafka.server.KafkaServerStartable.startup(KafkaServerStartable.scala:39) at kafka.Kafka$.main(Kafka.scala:67) at kafka.Kafka.main(Kafka.scala) [2018-02-13 04:44:11,113] INFO shutting down (kafka.server.KafkaServer)

Below find server.properties from kafka broker

[root@vijayhdf-1 conf]# cat server.properties # Generated by Apache Ambari. Tue Feb 13 04:53:24 2018 auto.create.topics.enable=true auto.leader.rebalance.enable=true broker.rack=/default-rack compression.type=producer controlled.shutdown.enable=true controlled.shutdown.max.retries=3 controlled.shutdown.retry.backoff.ms=5000 controller.message.queue.size=10 controller.socket.timeout.ms=30000 default.replication.factor=1 delete.topic.enable=false external.kafka.metrics.exclude.prefix=kafka.network.RequestMetrics,kafka.server.DelayedOperationPurgatory,kafka.server.BrokerTopicMetrics.BytesRejectedPerSec,kafka.server.KafkaServer.ClusterId external.kafka.metrics.include.prefix=kafka.network.RequestMetrics.ResponseQueueTimeMs.request.OffsetCommit.98percentile,kafka.network.RequestMetrics.ResponseQueueTimeMs.request.Offsets.95percentile,kafka.network.RequestMetrics.ResponseSendTimeMs.request.Fetch.95percentile,kafka.network.RequestMetrics.RequestsPerSec.request fetch.purgatory.purge.interval.requests=10000 kafka.ganglia.metrics.group=kafka kafka.ganglia.metrics.host=localhost kafka.ganglia.metrics.port=8671 kafka.ganglia.metrics.reporter.enabled=true kafka.metrics.reporters=org.apache.hadoop.metrics2.sink.kafka.KafkaTimelineMetricsReporter kafka.timeline.metrics.hosts=vijayhdp-1.novalocal kafka.timeline.metrics.maxRowCacheSize=10000 kafka.timeline.metrics.port=6188 kafka.timeline.metrics.protocol=http kafka.timeline.metrics.reporter.enabled=true kafka.timeline.metrics.reporter.sendInterval=5900 kafka.timeline.metrics.truststore.password=bigdata kafka.timeline.metrics.truststore.path=/etc/security/clientKeys/all.jks kafka.timeline.metrics.truststore.type=jks leader.imbalance.check.interval.seconds=300 leader.imbalance.per.broker.percentage=10 listeners=PLAINTEXT://vijayhdf-1.novalocal:6667 log.cleanup.interval.mins=10 log.dirs=/kafka-logs log.index.interval.bytes=4096 log.index.size.max.bytes=10485760 log.retention.bytes=-1 log.retention.hours=168 log.roll.hours=168 log.segment.bytes=1073741824 message.max.bytes=1000000 min.insync.replicas=1 num.io.threads=8 num.network.threads=3 num.partitions=1 num.recovery.threads.per.data.dir=1 num.replica.fetchers=1 offset.metadata.max.bytes=4096 offsets.commit.required.acks=-1 offsets.commit.timeout.ms=5000 offsets.load.buffer.size=5242880 offsets.retention.check.interval.ms=600000 offsets.retention.minutes=86400000 offsets.topic.compression.codec=0 offsets.topic.num.partitions=50 offsets.topic.replication.factor=3 offsets.topic.segment.bytes=104857600 port=6667 producer.purgatory.purge.interval.requests=10000 queued.max.requests=500 replica.fetch.max.bytes=1048576 replica.fetch.min.bytes=1 replica.fetch.wait.max.ms=500 replica.high.watermark.checkpoint.interval.ms=5000 replica.lag.max.messages=4000 replica.lag.time.max.ms=10000 replica.socket.receive.buffer.bytes=65536 replica.socket.timeout.ms=30000 sasl.kerberos.principal.to.local.rules=RULE:[1:$1@$0]([email protected])s/.*/ambari-qa/,RULE:[1:$1@$0]([email protected])s/.*/hbase/,RULE:[1:$1@$0]([email protected])s/.*/hdfs/,RULE:[1:$1@$0](.*@NOVALOCAL.COM)s/@.*//,RULE:[2:$1@$0]([email protected])s/.*/activity_analyzer/,RULE:[2:$1@$0]([email protected])s/.*/activity_explorer/,RULE:[2:$1@$0]([email protected])s/.*/ams/,RULE:[2:$1@$0]([email protected])s/.*/ams/,RULE:[2:$1@$0]([email protected])s/.*/hdfs/,RULE:[2:$1@$0]([email protected])s/.*/hbase/,RULE:[2:$1@$0]([email protected])s/.*/hive/,RULE:[2:$1@$0]([email protected])s/.*/mapred/,RULE:[2:$1@$0]([email protected])s/.*/hdfs/,RULE:[2:$1@$0]([email protected])s/.*/knox/,RULE:[2:$1@$0]([email protected])s/.*/nifi/,RULE:[2:$1@$0]([email protected])s/.*/yarn/,RULE:[2:$1@$0]([email protected])s/.*/hdfs/,RULE:[2:$1@$0]([email protected])s/.*/ranger/,RULE:[2:$1@$0]([email protected])s/.*/rangertagsync/,RULE:[2:$1@$0]([email protected])s/.*/rangerusersync/,RULE:[2:$1@$0]([email protected])s/.*/yarn/,RULE:[2:$1@$0]([email protected])s/.*/yarn/,DEFAULT socket.receive.buffer.bytes=102400 socket.request.max.bytes=104857600 socket.send.buffer.bytes=102400 zookeeper.connect=vijayhdp-3.novalocal:2181,vijayhdp-2.novalocal:2181,vijayhdp-1.novalocal:2181 zookeeper.connection.timeout.ms=25000 zookeeper.session.timeout.ms=30000 zookeeper.set.acl=true zookeeper.sync.time.ms=2000

Kindly help me to fix the issue

[#2]

@Vijay Mishra

zookeeper acl's needs to be changed before disabling the kerberos. Do you have any important data in kafka?

[#3]

@ Sandeep Nemuri,

No there is no imp data inside kafka brokers.

Kindly suggest.

- Vijay Mishra

[#4 · Accepted solution]

@Vijay Mishra

One quick thing you can do is to change the kafka root zk node (this is create a new znode and kafka will not have any reference of any old data).

zookeeper.connect=zk1:2181,zk2:2181,zk3:2181/kafka

or you need to enable the kerberos again and change the ACl's using below commands (Kafka will have old data) :

Log-in as user "kafka" on one of Kafka nodes: 
kinit -k -t /etc/security/keytabs/kafka.service.keytab kafka/_HOST
where _HOST should be replaced by the hostname of that node 
Run the following command to open zookeeper shell: 
/usr/hdp/current/kafka-broker/bin/zookeeper-shell.sh zkhostname:2181 
setAcl /brokers world:anyone:crdwa
setAcl /config world:anyone:crdwa
setAcl /controller world:anyone:crdwa
setAcl /admin world:anyone:crdwa

Post changing the acl's disable the kerberos.

[#5]

@Sandeep Nemuri

I have done enable and disable the kerberos which has fixed the issue for kafka not coming up post disabling the kerberos.

Your solution also looks good, i will try the same if i will get the error.

Other problem i have is kafka principals and keytab not getting created after enabling the cluster on same cluster, Is there anything you can suggest?

- Vijay Mishra