aFuerst commented on issue #5032:
URL: https://github.com/apache/openwhisk/issues/5032#issuecomment-812119620
I am getting this same error, and it seems to be a problem of kafka not
being able to keep a stable connection to zookeeper. Using Ubuntu 16.01
Relevant kafka log section:
```
[2021-04-01 17:54:53,847] INFO Initiating client connection,
connectString=172.17.0.1:2181 sessionTimeout=6000
watcher=kafka.zookeeper.ZooKeeperClient$ZooKeeperClientWatcher$@7e0b85f9
(org.apache.zookeeper.ZooKeeper)
[2021-04-01 17:54:53,892] INFO [ZooKeeperClient Kafka server] Waiting until
connected. (kafka.zookeeper.ZooKeeperClient)
[2021-04-01 17:54:53,898] INFO Opening socket connection to server
172.17.0.1/172.17.0.1:2181. Will not attempt to authenticate using SASL
(unknown error) (org.apache.zookeeper.ClientCnxn)
[2021-04-01 17:54:59,896] INFO [ZooKeeperClient Kafka server] Closing.
(kafka.zookeeper.ZooKeeperClient)
[2021-04-01 17:54:59,902] WARN Client session timed out, have not heard from
server in 6012ms for sessionid 0x0 (org.apache.zookeeper.ClientCnxn)
[2021-04-01 17:55:00,009] INFO Session: 0x0 closed
(org.apache.zookeeper.ZooKeeper)
[2021-04-01 17:55:00,012] INFO EventThread shut down for session: 0x0
(org.apache.zookeeper.ClientCnxn)
[2021-04-01 17:55:00,014] INFO [ZooKeeperClient Kafka server] Closed.
(kafka.zookeeper.ZooKeeperClient)
[2021-04-01 17:55:00,019] ERROR Fatal error during KafkaServer startup.
Prepare to shutdown (kafka.server.KafkaServer)
kafka.zookeeper.ZooKeeperClientTimeoutException: Timed out waiting for
connection while in state: CONNECTING
at
kafka.zookeeper.ZooKeeperClient.$anonfun$waitUntilConnected$3(ZooKeeperClient.scala:258)
at
scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
at kafka.utils.CoreUtils$.inLock(CoreUtils.scala:253)
at
kafka.zookeeper.ZooKeeperClient.waitUntilConnected(ZooKeeperClient.scala:254)
at kafka.zookeeper.ZooKeeperClient.<init>(ZooKeeperClient.scala:112)
at kafka.zk.KafkaZkClient$.apply(KafkaZkClient.scala:1826)
at kafka.server.KafkaServer.createZkClient$1(KafkaServer.scala:364)
at kafka.server.KafkaServer.initZkClient(KafkaServer.scala:387)
at kafka.server.KafkaServer.startup(KafkaServer.scala:207)
at
kafka.server.KafkaServerStartable.startup(KafkaServerStartable.scala:38)
at kafka.Kafka$.main(Kafka.scala:84)
at kafka.Kafka.main(Kafka.scala)
[2021-04-01 17:55:00,022] INFO shutting down (kafka.server.KafkaServer)
[2021-04-01 17:55:00,032] INFO shut down completed (kafka.server.KafkaServer)
[2021-04-01 17:55:00,034] ERROR Exiting Kafka.
(kafka.server.KafkaServerStartable)
[2021-04-01 17:55:00,039] INFO shutting down (kafka.server.KafkaServer)
```
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