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From "vlad.gm@gmail.com" <vlad...@gmail.com>
Subject Re: NPE during start up
Date Mon, 16 Feb 2015 02:41:13 GMT
https://issues.apache.org/jira/browse/HELIX-548
On Feb 15, 2015 6:38 PM, "kishore g" <g.kishore@gmail.com> wrote:

> Hi Vlad,
>
> Was there any jira associated with it?
>
> thanks.
> Kishore G
>
> On Sun, Feb 15, 2015 at 4:36 PM, vlad.gm@gmail.com <vlad.gm@gmail.com>
> wrote:
>
>> Looks like the same problem we encountered recently.
>>
>> Regards,
>> Vlad
>> On Feb 15, 2015 4:35 PM, "kishore g" <g.kishore@gmail.com> wrote:
>>
>> > Steph described this problem on IRC.
>> >
>> > He is using 0.7.1. On connecting to cluster he gets this NPE
>> >
>> > http://pastebin.com/YE3fwK5i
>> >
>> > java.lang.NullPointerException
>> >         at
>> >
>> org.apache.helix.messaging.handling.HelixTaskExecutor.createMessageHandler(HelixTaskExecutor.java:661)
>> >         at
>> >
>> org.apache.helix.messaging.handling.HelixTaskExecutor.onMessage(HelixTaskExecutor.java:581)
>> >         at
>> >
>> org.apache.helix.manager.zk.ZkCallbackHandler.invoke(ZkCallbackHandler.java:202)
>> >         at
>> >
>> org.apache.helix.manager.zk.ZkCallbackHandler.init(ZkCallbackHandler.java:336)
>> >         at
>> >
>> org.apache.helix.manager.zk.ZkCallbackHandler.<init>(ZkCallbackHandler.java:130)
>> >         at
>> >
>> org.apache.helix.manager.zk.ZkHelixConnection.addListener(ZkHelixConnection.java:533)
>> >         at
>> >
>> org.apache.helix.manager.zk.ZkHelixConnection.addMessageListener(ZkHelixConnection.java:267)
>> >         at
>> >
>> org.apache.helix.manager.zk.ZkHelixParticipant.setupMsgHandler(ZkHelixParticipant.java:347)
>> >         at
>> >
>> org.apache.helix.manager.zk.ZkHelixParticipant.init(ZkHelixParticipant.java:383)
>> >         at
>> >
>> org.apache.helix.manager.zk.ZkHelixParticipant.onConnected(ZkHelixParticipant.java:401)
>> >         at
>> >
>> org.apache.helix.manager.zk.ZkHelixParticipant.start(ZkHelixParticipant.java:428)
>> >         at
>> >
>> com.example.ProtostuffServerNode.spinUpParticipant(ProtostuffServerNode.java:134)
>> >
>> >
>> > Here is his connection code.
>> >
>> > http://pastebin.com/QRfVU1tc
>> >
>> > private static HelixParticipant spinUpParticipant(HelixAdmin admin,
>> > ParticipantId participantId) {
>> >                 LOGGER.info("Starting up "+participantId);
>> >                 HelixConnection connection = new ZkHelixConnection(
>> > ZK_ADDRESS);
>> >                 connection.connect();
>> >                 HelixParticipant participant = connection.
>> > createParticipant(CLUSTER_ID, participantId);
>> >                 StateMachineEngine stateMach = participant.
>> > getStateMachineEngine();
>> >
>> >                 StateTransitionHandlerFactory<LocalTransitionHandler>
>> > transitionHandlerFactory = new OnlineOfflineHandlerFactory();
>> >                 stateMach.registerStateModelFactory(STATE_MODEL_NAME,
>> > transitionHandlerFactory);
>> >                 participant.start();
>> >
>> >                 admin.enableInstance(CLUSTER_NAME,
>> participantId.toString(
>> > ), true);
>> >
>> >                 return participant;
>> >         }
>> >
>> > Adding 3s sleep after registerStateModelFactory works. Any idea what is
>> > happening.
>> >
>> > thanks,
>> > Kishore G
>> >
>> >
>> >
>> >
>>
>
>

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