[
https://issues.apache.org/jira/browse/ZOOKEEPER-4652?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Edyta Nowak updated ZOOKEEPER-4652:
-----------------------------------
Description:
I am using camel's zookeeper-master component for some routes.
I was testing the master election and found out that when I kill the zookeeper,
and before the kill I was having few instances of that route working correctly
(with one master elected) and then start zookeeper again, then zookeeper has
problems with master election. It selects for example two instances as masters
and for the other instances it returns the error:
```
org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode = NoNode
for /camel/zookeepermaster/clusters/master/crewfile
at org.apache.zookeeper.KeeperException.create(KeeperException.java:118)
~[zookeeper-3.5.9.jar:3.5.9]
at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
~[zookeeper-3.5.9.jar:3.5.9]
at org.apache.zookeeper.ZooKeeper.getChildren(ZooKeeper.java:2707)
~[zookeeper-3.5.9.jar:3.5.9]
at
org.apache.curator.framework.imps.GetChildrenBuilderImpl$3.call(GetChildrenBuilderImpl.java:242)
~[curator-framework-4.3.0.jar:4.3.0]
at
org.apache.curator.framework.imps.GetChildrenBuilderImpl$3.call(GetChildrenBuilderImpl.java:231)
~[curator-framework-4.3.0.jar:4.3.0]
at
org.apache.curator.connection.StandardConnectionHandlingPolicy.callWithRetry(StandardConnectionHandlingPolicy.java:67)
~[curator-client-4.3.0.jar:na]
at org.apache.curator.RetryLoop.callWithRetry(RetryLoop.java:81)
~[curator-client-4.3.0.jar:na]
at
org.apache.curator.framework.imps.GetChildrenBuilderImpl.pathInForeground(GetChildrenBuilderImpl.java:228)
~[curator-framework-4.3.0.jar:4.3.0]
at
org.apache.curator.framework.imps.GetChildrenBuilderImpl.forPath(GetChildrenBuilderImpl.java:219)
~[curator-framework-4.3.0.jar:4.3.0]
at
org.apache.curator.framework.imps.GetChildrenBuilderImpl.forPath(GetChildrenBuilderImpl.java:41)
~[curator-framework-4.3.0.jar:4.3.0]
at
org.apache.camel.component.zookeepermaster.group.internal.ZooKeeperGroup.refresh(ZooKeeperGroup.java:474)
~[camel-zookeeper-master-3.14.4.jar:3.14.4]
at
org.apache.camel.component.zookeepermaster.group.internal.RefreshOperation.invoke(RefreshOperation.java:30)
~[camel-zookeeper-master-3.14.4.jar:3.14.4]
at
org.apache.camel.component.zookeepermaster.group.internal.CompositeOperation.invoke(CompositeOperation.java:40)
~[camel-zookeeper-master-3.14.4.jar:3.14.4]
at
org.apache.camel.component.zookeepermaster.group.internal.ZooKeeperGroup.mainLoop(ZooKeeperGroup.java:585)
~[camel-zookeeper-master-3.14.4.jar:3.14.4]
at
org.apache.camel.component.zookeepermaster.group.internal.ZooKeeperGroup.access$200(ZooKeeperGroup.java:77)
~[camel-zookeeper-master-3.14.4.jar:3.14.4]
at
org.apache.camel.component.zookeepermaster.group.internal.ZooKeeperGroup$4.run(ZooKeeperGroup.java:183)
~[camel-zookeeper-master-3.14.4.jar:3.14.4]
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
~[na:na]
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
~[na:na]
at java.base/java.lang.Thread.run(Thread.java:829) ~[na:na]
```
What is wrong with zookeeper? Why it is having problem with master election?
was:
I am using camel's zookeeper-master component for some routes.
I was testing the master election and found out that when I kill the zookeeper,
and before the kill I was having few instances of that route working correctly
(with one master elected) and then start zookeeper again, then zookeeper has
problems with master election. It selects for example two instances as masters
and for the other instances it returns the error:
```
org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode = NoNode
for /camel/zookeepermaster/clusters/master/crewfile
at org.apache.zookeeper.KeeperException.create(KeeperException.java:118)
~[zookeeper-3.5.9.jar:3.5.9]
at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
~[zookeeper-3.5.9.jar:3.5.9]
at org.apache.zookeeper.ZooKeeper.getChildren(ZooKeeper.java:2707)
~[zookeeper-3.5.9.jar:3.5.9]
at
org.apache.curator.framework.imps.GetChildrenBuilderImpl$3.call(GetChildrenBuilderImpl.java:242)
~[curator-framework-4.3.0.jar:4.3.0]
at
org.apache.curator.framework.imps.GetChildrenBuilderImpl$3.call(GetChildrenBuilderImpl.java:231)
~[curator-framework-4.3.0.jar:4.3.0]
at
org.apache.curator.connection.StandardConnectionHandlingPolicy.callWithRetry(StandardConnectionHandlingPolicy.java:67)
~[curator-client-4.3.0.jar:na]
at org.apache.curator.RetryLoop.callWithRetry(RetryLoop.java:81)
~[curator-client-4.3.0.jar:na]
at
org.apache.curator.framework.imps.GetChildrenBuilderImpl.pathInForeground(GetChildrenBuilderImpl.java:228)
~[curator-framework-4.3.0.jar:4.3.0]
at
org.apache.curator.framework.imps.GetChildrenBuilderImpl.forPath(GetChildrenBuilderImpl.java:219)
~[curator-framework-4.3.0.jar:4.3.0]
at
org.apache.curator.framework.imps.GetChildrenBuilderImpl.forPath(GetChildrenBuilderImpl.java:41)
~[curator-framework-4.3.0.jar:4.3.0]
at
org.apache.camel.component.zookeepermaster.group.internal.ZooKeeperGroup.refresh(ZooKeeperGroup.java:474)
~[camel-zookeeper-master-3.14.4.jar:3.14.4]
at
org.apache.camel.component.zookeepermaster.group.internal.RefreshOperation.invoke(RefreshOperation.java:30)
~[camel-zookeeper-master-3.14.4.jar:3.14.4]
at
org.apache.camel.component.zookeepermaster.group.internal.CompositeOperation.invoke(CompositeOperation.java:40)
~[camel-zookeeper-master-3.14.4.jar:3.14.4]
at
org.apache.camel.component.zookeepermaster.group.internal.ZooKeeperGroup.mainLoop(ZooKeeperGroup.java:585)
~[camel-zookeeper-master-3.14.4.jar:3.14.4]
at
org.apache.camel.component.zookeepermaster.group.internal.ZooKeeperGroup.access$200(ZooKeeperGroup.java:77)
~[camel-zookeeper-master-3.14.4.jar:3.14.4]
at
org.apache.camel.component.zookeepermaster.group.internal.ZooKeeperGroup$4.run(ZooKeeperGroup.java:183)
~[camel-zookeeper-master-3.14.4.jar:3.14.4]
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
~[na:na]
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
~[na:na]
at java.base/java.lang.Thread.run(Thread.java:829) ~[na:na]
```
> Zookeeper electing two masters
> ------------------------------
>
> Key: ZOOKEEPER-4652
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-4652
> Project: ZooKeeper
> Issue Type: Bug
> Reporter: Edyta Nowak
> Priority: Major
>
> I am using camel's zookeeper-master component for some routes.
> I was testing the master election and found out that when I kill the
> zookeeper, and before the kill I was having few instances of that route
> working correctly (with one master elected) and then start zookeeper again,
> then zookeeper has problems with master election. It selects for example two
> instances as masters and for the other instances it returns the error:
> ```
> org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode =
> NoNode for /camel/zookeepermaster/clusters/master/crewfile
> at org.apache.zookeeper.KeeperException.create(KeeperException.java:118)
> ~[zookeeper-3.5.9.jar:3.5.9]
> at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
> ~[zookeeper-3.5.9.jar:3.5.9]
> at org.apache.zookeeper.ZooKeeper.getChildren(ZooKeeper.java:2707)
> ~[zookeeper-3.5.9.jar:3.5.9]
> at
> org.apache.curator.framework.imps.GetChildrenBuilderImpl$3.call(GetChildrenBuilderImpl.java:242)
> ~[curator-framework-4.3.0.jar:4.3.0]
> at
> org.apache.curator.framework.imps.GetChildrenBuilderImpl$3.call(GetChildrenBuilderImpl.java:231)
> ~[curator-framework-4.3.0.jar:4.3.0]
> at
> org.apache.curator.connection.StandardConnectionHandlingPolicy.callWithRetry(StandardConnectionHandlingPolicy.java:67)
> ~[curator-client-4.3.0.jar:na]
> at org.apache.curator.RetryLoop.callWithRetry(RetryLoop.java:81)
> ~[curator-client-4.3.0.jar:na]
> at
> org.apache.curator.framework.imps.GetChildrenBuilderImpl.pathInForeground(GetChildrenBuilderImpl.java:228)
> ~[curator-framework-4.3.0.jar:4.3.0]
> at
> org.apache.curator.framework.imps.GetChildrenBuilderImpl.forPath(GetChildrenBuilderImpl.java:219)
> ~[curator-framework-4.3.0.jar:4.3.0]
> at
> org.apache.curator.framework.imps.GetChildrenBuilderImpl.forPath(GetChildrenBuilderImpl.java:41)
> ~[curator-framework-4.3.0.jar:4.3.0]
> at
> org.apache.camel.component.zookeepermaster.group.internal.ZooKeeperGroup.refresh(ZooKeeperGroup.java:474)
> ~[camel-zookeeper-master-3.14.4.jar:3.14.4]
> at
> org.apache.camel.component.zookeepermaster.group.internal.RefreshOperation.invoke(RefreshOperation.java:30)
> ~[camel-zookeeper-master-3.14.4.jar:3.14.4]
> at
> org.apache.camel.component.zookeepermaster.group.internal.CompositeOperation.invoke(CompositeOperation.java:40)
> ~[camel-zookeeper-master-3.14.4.jar:3.14.4]
> at
> org.apache.camel.component.zookeepermaster.group.internal.ZooKeeperGroup.mainLoop(ZooKeeperGroup.java:585)
> ~[camel-zookeeper-master-3.14.4.jar:3.14.4]
> at
> org.apache.camel.component.zookeepermaster.group.internal.ZooKeeperGroup.access$200(ZooKeeperGroup.java:77)
> ~[camel-zookeeper-master-3.14.4.jar:3.14.4]
> at
> org.apache.camel.component.zookeepermaster.group.internal.ZooKeeperGroup$4.run(ZooKeeperGroup.java:183)
> ~[camel-zookeeper-master-3.14.4.jar:3.14.4]
> at
> java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
> ~[na:na]
> at
> java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
> ~[na:na]
> at java.base/java.lang.Thread.run(Thread.java:829) ~[na:na]
> ```
>
>
> What is wrong with zookeeper? Why it is having problem with master election?
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