DevOps SRE Blog

  As part of regular maintenance, we shutdown Kafka. When we tried to start it, it failed with below error: [2021-11-15 05:01:03,824] INFO Socket connection established to mykafka-a1.abc.com/10.0.95.100:2181, initiating session (org.apache.zookeeper.ClientCnxn) [2021-11-15 05:01:03,824] INFO Unable to read additional data from server sessionid 0x0, likely server has closed socket, closing socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn) [2021-11-15 05:01:03,889] INFO [ZooKeeperClient Kafka server] Closing. (kafka.zookeeper.ZooKeeperClient) [2021-11-15 05:01:03,927] INFO Session: 0x0 closed (org.apache.zookeeper.ZooKeeper) [2021-11-15 05:01:03,927] INFO EventThread shut down for session: 0x0 (org.apache.zookeeper.ClientCnxn) [2021-11-15 05:01:03,930] INFO [ZooKeeperClient Kafka server] Closed. (kafka.zookeeper.ZooKeeperClient) [2021-11-15 05:01:03,933] ERROR Fatal error during KafkaServer startup. Prepare to shutdown (kafka.server.KafkaServer) kafka.zooke...

We as sysadmin spend lot of time at command line and most of the time we use few regular commands like going to logs directory, searching history. I have prepared bash aliases that can be used to save few keystrokes for various applications like weblogic, kubernetes, Boomi etc. And these can be downloaded from   github . Please feel free to use and add your own commands/scripts.

  We have a 3 node Boomi cluster that we were not able to start. When we start it and check status status is shown as ‘ Atom is Running’ but after some time atom stops. When we checked container logs we found below error: Nov 11, 2021 4:15:48 AM PST FINE [com.boomi.container.plugin.BasePluginManager createPluginClassLoader] Creating QUEUE_SERVER Plugin ClassLoader with overrides: [] Nov 11, 2021 4:15:48 AM PST SEVERE [com.boomi.container.core.BaseContainer start] Atom startup failed, shutting down Nov 11, 2021 4:15:48 AM PST INFO [com.boomi.util.LogUtil doLog] Atom stop requested. Current status is INITIALIZING Nov 11, 2021 4:15:48 AM PST INFO [com.boomi.container.config.ContainerConfig setStatus] Container status changed from INITIALIZING to STOPPING: Atom startup failed, shutting down Nov 11, 2021 4:15:48 AM PST FINE [com.boomi.schedule.Scheduler removeScheduleGroup] Removing schedule for groupId: internal-dead-attachment-group Nov 11, 2021 4:15:48 AM PST INFO [com.boomi.containe...