[jira] [Issue Comment Deleted] (STORM-770) NullPointerException in consumeBatchToCursor

["Zhihua Deng (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/STORM-770?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Zhihua Deng updated STORM-770:
------------------------------
    Comment: was deleted

(was:  and I think the output collector instance is thread safe, cause this instance holds no member variables.)

> NullPointerException in consumeBatchToCursor
> --------------------------------------------
>
>                 Key: STORM-770
>                 URL: https://issues.apache.org/jira/browse/STORM-770
>             Project: Apache Storm
>          Issue Type: Bug
>    Affects Versions: 0.9.2-incubating
>            Reporter: Stas Levin
>
> We got the following exception after our topology had been up for ~2 days, and I was wondering if it might be related. 
> Looks like "task" in "mk-transfer-fn" is null, making "(.add remote (TaskMessage. task (.serialize serializer tuple)))" fail on NPE (worker.clj:128, storm-core-0.9.2-incubating.jar)
> java.lang.RuntimeException: java.lang.NullPointerException
> at backtype.storm.utils.DisruptorQueue.consumeBatchToCursor(DisruptorQueue.java:128) ~[storm-core-0.9.2-incubating.jar:0.9.2-incubating]
> at backtype.storm.utils.DisruptorQueue.consumeBatchWhenAvailable(DisruptorQueue.java:99) ~[storm-core-0.9.2-incubating.jar:0.9.2-incubating]
> at backtype.storm.disruptor$consume_batch_when_available.invoke(disruptor.clj:80) ~[storm-core-0.9.2-incubating.jar:0.9.2-incubating]
> at backtype.storm.disruptor$consume_loop_STAR_$fn__758.invoke(disruptor.clj:94) ~[storm-core-0.9.2-incubating.jar:0.9.2-incubating]
> at backtype.storm.util$async_loop$fn__457.invoke(util.clj:431) ~[storm-core-0.9.2-incubating.jar:0.9.2-incubating]
> at clojure.lang.AFn.run(AFn.java:24) [clojure-1.5.1.jar:na]
> at java.lang.Thread.run(Thread.java:745) [na:1.7.0_72]
> Caused by: java.lang.NullPointerException: null
> at clojure.lang.RT.intCast(RT.java:1087) ~[clojure-1.5.1.jar:na]
> at backtype.storm.daemon.worker$mk_transfer_fn$fn__5748.invoke(worker.clj:128) ~[storm-core-0.9.2-incubating.jar:0.9.2-incubating]
> at backtype.storm.daemon.executor$start_batch_transfer_GT_worker_handler_BANG$fn__5483.invoke(executor.clj:256) ~[storm-core-0.9.2-incubating.jar:0.9.2-incubating]
> at backtype.storm.disruptor$clojure_handler$reify__745.onEvent(disruptor.clj:58) ~[storm-core-0.9.2-incubating.jar:0.9.2-incubating]
> at backtype.storm.utils.DisruptorQueue.consumeBatchToCursor(DisruptorQueue.java:125) ~[storm-core-0.9.2-incubating.jar:0.9.2-incubating]
> ... 6 common frames omitted,java.lang.RuntimeException: java.lang.NullPointerException
> Any ideas?
> P.S.
> Also saw it here: 
> http://mail-archives.apache.org/mod_mbox/storm-user/201501.mbox/%3CCABcMBhCusXXU=V1e66wfUATGYH1euQnd1SiOG65-Tp8xLWx0ww@mail.gmail.com%3E
> https://mail-archives.apache.org/mod_mbox/storm-user/201408.mbox/%3CCAJuQM_4KXHSH2_X08ujuQR76m2C+Dswp0fCiJBmfCAeyqgsFHQ@mail.gmail.com%3E
> Comment from Bobby
> http://mail-archives.apache.org/mod_mbox/storm-user/201501.mbox/%3C574363643.2791948.1420470097280.JavaMail.yahoo@jws10027.mail.ne1.yahoo.com%3E
> {quote}
> What version of storm are you using?  Are any of the bolts shell bolts?  There is a known
> issue where this can happen if two shell bolts share an executor, because they are multi-threaded. 
> - Bobby
> {quote}



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