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Posted to issues@camel.apache.org by "Claus Ibsen (JIRA)" <ji...@apache.org> on 2016/04/15 07:44:25 UTC
[jira] [Commented] (CAMEL-9851) Zookeeper RoutePolicy failing to
create znode
[ https://issues.apache.org/jira/browse/CAMEL-9851?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15242480#comment-15242480 ]
Claus Ibsen commented on CAMEL-9851:
------------------------------------
The last stacktrace is with Camel 2.16.0. Can you make sure you use the same version eg 2.17.0
> Zookeeper RoutePolicy failing to create znode
> ---------------------------------------------
>
> Key: CAMEL-9851
> URL: https://issues.apache.org/jira/browse/CAMEL-9851
> Project: Camel
> Issue Type: Bug
> Components: camel-zookeeper
> Affects Versions: 2.17.0
> Environment: mac
> Reporter: Minh Tran
>
> I am trying to setup a ZooKeeper route policy like this
> ZooKeeperRoutePolicy policy = new ZooKeeperRoutePolicy("zookeeper:localhost/regexTest1?create=true", 1);
> from("direct:start").routePolicy(policy).to(“mock:end”);
> And when I run my unit test to trigger the route, I get the following exception in my logs
> {noformat}
> Node '/regexTest1/192.168.202.25-3306c9d2-1354-4dbe-aaff-846eee5bb60d' did not exist, creating it.
> Error setting up election node /regexTest1/192.168.202.25-25829641-de1f-4389-9bb6-2967ea60de1a
> org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode = NoNode for /regexTest1/192.168.202.25-25829641-de1f-4389-9bb6-2967ea60de1a
> at org.apache.zookeeper.KeeperException.create(KeeperException.java:111) ~[zookeeper-3.4.8.jar:3.4.8--1]
> at org.apache.zookeeper.KeeperException.create(KeeperException.java:51) ~[zookeeper-3.4.8.jar:3.4.8--1]
> at org.apache.zookeeper.ZooKeeper.create(ZooKeeper.java:783) ~[zookeeper-3.4.8.jar:3.4.8--1]
> at org.apache.camel.component.zookeeper.operations.CreateOperation.getResult(CreateOperation.java:52) ~[camel-zookeeper-2.17.0.jar:2.17.0]
> at org.apache.camel.component.zookeeper.operations.ZooKeeperOperation.get(ZooKeeperOperation.java:70) ~[camel-zookeeper-2.17.0.jar:2.17.0]
> at org.apache.camel.component.zookeeper.ZookeeperProducer.createNode(ZookeeperProducer.java:222) ~[camel-zookeeper-2.17.0.jar:2.17.0]
> at org.apache.camel.component.zookeeper.ZookeeperProducer.synchronouslySetData(ZookeeperProducer.java:238) ~[camel-zookeeper-2.17.0.jar:2.17.0]
> at org.apache.camel.component.zookeeper.ZookeeperProducer.process(ZookeeperProducer.java:88) ~[camel-zookeeper-2.17.0.jar:2.17.0]
> at org.apache.camel.util.AsyncProcessorConverterHelper$ProcessorToAsyncProcessorBridge.process(AsyncProcessorConverterHelper.java:61) ~[camel-core-2.17.0.jar:2.17.0]
> at org.apache.camel.processor.CamelInternalProcessor.process(CamelInternalProcessor.java:190) [camel-core-2.17.0.jar:2.17.0]
> at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:109) [camel-core-2.17.0.jar:2.17.0]
> at org.apache.camel.processor.UnitOfWorkProducer.process(UnitOfWorkProducer.java:68) [camel-core-2.17.0.jar:2.17.0]
> at org.apache.camel.impl.ProducerCache$2.doInProducer(ProducerCache.java:412) [camel-core-2.17.0.jar:2.17.0]
> at org.apache.camel.impl.ProducerCache$2.doInProducer(ProducerCache.java:380) [camel-core-2.17.0.jar:2.17.0]
> at org.apache.camel.impl.ProducerCache.doInProducer(ProducerCache.java:270) [camel-core-2.17.0.jar:2.17.0]
> at org.apache.camel.impl.ProducerCache.sendExchange(ProducerCache.java:380) [camel-core-2.17.0.jar:2.17.0]
> at org.apache.camel.impl.ProducerCache.send(ProducerCache.java:205) [camel-core-2.17.0.jar:2.17.0]
> at org.apache.camel.impl.DefaultProducerTemplate.send(DefaultProducerTemplate.java:119) [camel-core-2.17.0.jar:2.17.0]
> at org.apache.camel.component.zookeeper.policy.ZooKeeperElection.createCandidateNode(ZooKeeperElection.java:146) [camel-zookeeper-2.17.0.jar:2.17.0]
> at org.apache.camel.component.zookeeper.policy.ZooKeeperElection.testAndCreateCandidateNode(ZooKeeperElection.java:116) [camel-zookeeper-2.17.0.jar:2.17.0]
> at org.apache.camel.component.zookeeper.policy.ZooKeeperElection.isMaster(ZooKeeperElection.java:92) [camel-zookeeper-2.17.0.jar:2.17.0]
> at org.apache.camel.component.zookeeper.policy.ZooKeeperRoutePolicy.onExchangeBegin(ZooKeeperRoutePolicy.java:79) [camel-zookeeper-2.17.0.jar:2.17.0]
> at org.apache.camel.processor.CamelInternalProcessor$RoutePolicyAdvice.before(CamelInternalProcessor.java:483) [camel-core-2.17.0.jar:2.17.0]
> {noformat}
> It looks like it knows the znode doesn’t exist but seems to be unable to create it? From the zookeeper server side logs, I can see incoming connections and it returning the error that the znode doesn’t exist but doesn’t look like there’s any attempts to create it after that.
> I’ve tried using the zookeeper component directly in my route and I am able to create/write/read from a znode fine so it seems like it’s just failing in the route policy for some reason.
> I am using Camel 2.17.0 and zookeeper 3.4.8
> I’ve investigated this further and the exception is thrown from the ZooKeeper.create method. Camel is actually trying to create a znode with a path /regexTest1/192.168.202.25-25829641-de1f-4389-9bb6-2967ea60de1a without creating the parent node /regexTest1 first.
> According to the Zookeeper.create method documentation
> "If the parent node does not exist in the ZooKeeper, a KeeperException
> * with error code KeeperException.NoNode will be thrown."
> And I don’t see anywhere in Camel’s code where it is creating the parent nodes first before attempting to create the final node for master election.
> So I removed the path off the uri for the route policy like this
> ZooKeeperRoutePolicy policy = new ZooKeeperRoutePolicy("zookeeper:localhost", 1);
> And it has gotten past that error but now has encountered a different error where it has trouble creating a threadpool.
> {noformat}
> 2016-04-08 11:47:15,071 [main] ERROR org.apache.camel.component.zookeeper.policy.ZooKeeperElection - Error configuring ZookeeperElection
> java.lang.IllegalArgumentException: id for thread pool org.apache.camel.util.concurrent.RejectableThreadPoolExecutor@1ec912d7[Running, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 0][Camel-Zookeeper Ops executor] must be specified and not empty
> at org.apache.camel.util.ObjectHelper.notEmpty(ObjectHelper.java:351) ~[camel-core-2.16.0.jar:2.16.0]
> at org.apache.camel.impl.DefaultExecutorServiceManager.onThreadPoolCreated(DefaultExecutorServiceManager.java:522) ~[camel-core-2.16.0.jar:2.16.0]
> at org.apache.camel.impl.DefaultExecutorServiceManager.newThreadPool(DefaultExecutorServiceManager.java:191) ~[camel-core-2.16.0.jar:2.16.0]
> at org.apache.camel.impl.DefaultExecutorServiceManager.newFixedThreadPool(DefaultExecutorServiceManager.java:230) ~[camel-core-2.16.0.jar:2.16.0]
> at org.apache.camel.component.zookeeper.ZooKeeperConsumer.doStart(ZooKeeperConsumer.java:72) ~[camel-zookeeper-2.16.0.jar:2.16.0]
> at org.apache.camel.support.ServiceSupport.start(ServiceSupport.java:61) ~[camel-core-2.16.0.jar:2.16.0]
> at org.apache.camel.impl.DefaultCamelContext.startService(DefaultCamelContext.java:3219) ~[camel-core-2.16.0.jar:2.16.0]
> {noformat}
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