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Posted to dev@kafka.apache.org by "Joel Koshy (JIRA)" <ji...@apache.org> on 2011/08/12 03:21:27 UTC
[jira] [Commented] (KAFKA-94) KafkaServer can throw a
NullPointerException during startup if zookeeper is down
[ https://issues.apache.org/jira/browse/KAFKA-94?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13083863#comment-13083863 ]
Joel Koshy commented on KAFKA-94:
---------------------------------
Since the logmanager is also uninitialized, we should check for that as well.
2011/08/12 00:22:36.191 FATAL [KafkaServer] [pool-2-thread-1] [kafka] org.I0Itec.zkclient.exception.ZkTimeoutException: Unable to connect to zookeeper server within timeout: 300000
at org.I0Itec.zkclient.ZkClient.connect(ZkClient.java:876)
at org.I0Itec.zkclient.ZkClient.<init>(ZkClient.java:98)
at org.I0Itec.zkclient.ZkClient.<init>(ZkClient.java:84)
at kafka.server.KafkaZooKeeper.startup(KafkaZooKeeper.scala:45)
at kafka.log.LogManager.<init>(LogManager.scala:86)
at kafka.server.KafkaServer.startup(KafkaServer.scala:59)
at kafka.server.KafkaServerStartable.startup(KafkaServerStartable.scala:40)
at com.linkedin.kafka.KafkaStartable.start(KafkaStartable.java:49)
at com.linkedin.spring.servlet.ComponentsContextLoaderListener.setServletContextAttributes(ComponentsContextLoaderListener.java:113)
at com.linkedin.spring.servlet.ComponentsContextLoaderListener.contextInitialized(ComponentsContextLoaderListener.java:50)
at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:549)
at org.mortbay.jetty.servlet.Context.startContext(Context.java:136)
at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1282)
at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:518)
at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:499)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at com.linkedin.emweb.ContextBasedHandlerImpl.doStart(ContextBasedHandlerImpl.java:123)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at com.linkedin.emweb.WebappDeployerImpl.start(WebappDeployerImpl.java:324)
at com.linkedin.emweb.WebappDeployerImpl.deploy(WebappDeployerImpl.java:178)
at com.linkedin.emweb.StateKeeperWebappDeployer.deploy(StateKeeperWebappDeployer.java:73)
at com.linkedin.emweb.mbeans.WebappDeployerAdmin.deploy(WebappDeployerAdmin.java:86)
at com.linkedin.emweb.mbeans.WebappDeployerAdmin$1.call(WebappDeployerAdmin.java:130)
at com.linkedin.emweb.mbeans.WebappDeployerAdmin$1.call(WebappDeployerAdmin.java:127)
at com.linkedin.emweb.mbeans.WebappDeployerAdmin$3.call(WebappDeployerAdmin.java:171)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)
> KafkaServer can throw a NullPointerException during startup if zookeeper is down
> --------------------------------------------------------------------------------
>
> Key: KAFKA-94
> URL: https://issues.apache.org/jira/browse/KAFKA-94
> Project: Kafka
> Issue Type: Bug
> Components: core
> Reporter: Joel Koshy
> Priority: Minor
>
> Starting up KafkaServer when zookeeper is down can lead to a NullPointerException as shown below. The LogManager throws a ZkTimeoutException from startup if zookeeper is down. This is caught and we call shutdown. socketServer is uninitialized at this point, and hence the NPE. Will upload patch in a bit.
> 2011/08/12 00:22:36.194 FATAL [KafkaServer] [pool-2-thread-1] [kafka] java.lang.NullPointerException
> at kafka.server.KafkaServer.shutdown(KafkaServer.scala:98)
> at kafka.server.KafkaServer.startup(KafkaServer.scala:84)
> at kafka.server.KafkaServerStartable.startup(KafkaServerStartable.scala:40)
> at com.linkedin.kafka.KafkaStartable.start(KafkaStartable.java:49)
> at com.linkedin.spring.servlet.ComponentsContextLoaderListener.setServletContextAttributes(ComponentsContextLoaderListener.java:113)
> at com.linkedin.spring.servlet.ComponentsContextLoaderListener.contextInitialized(ComponentsContextLoaderListener.java:50)
> at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:549)
> at org.mortbay.jetty.servlet.Context.startContext(Context.java:136)
> at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1282)
> at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:518)
> at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:499)
> at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
> at com.linkedin.emweb.ContextBasedHandlerImpl.doStart(ContextBasedHandlerImpl.java:123)
> at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
> at com.linkedin.emweb.WebappDeployerImpl.start(WebappDeployerImpl.java:324)
> at com.linkedin.emweb.WebappDeployerImpl.deploy(WebappDeployerImpl.java:178)
> at com.linkedin.emweb.StateKeeperWebappDeployer.deploy(StateKeeperWebappDeployer.java:73)
> at com.linkedin.emweb.mbeans.WebappDeployerAdmin.deploy(WebappDeployerAdmin.java:86)
> at com.linkedin.emweb.mbeans.WebappDeployerAdmin$1.call(WebappDeployerAdmin.java:130)
> at com.linkedin.emweb.mbeans.WebappDeployerAdmin$1.call(WebappDeployerAdmin.java:127)
> at com.linkedin.emweb.mbeans.WebappDeployerAdmin$3.call(WebappDeployerAdmin.java:171)
> at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
> at java.util.concurrent.FutureTask.run(FutureTask.java:138)
> at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:619)
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