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
 

     On Sunday, January 4, 2015 10:19 PM, clay teahouse 
<clayteaho...@gmail.com> wrote:
   

 Hi All,I have the following topologyspout -> Bolt1 --> Bolt2
Neither bolts are async or multi-threaded. Bolt2 uses http client to make 
post/put requests to a web server. Both bolts ack the tuples before exiting the 
execute.
The topology runs fine for a while under a load of about 50MB/minute. After 
about 10-15 minutes the topology dies with the following error. Any hint what 
the issue might be? I'd appreciate any feedback.
java.lang.RuntimeException: java.lang.NullPointerException        at 
backtype.storm.utils.DisruptorQueue.consumeBatchToCursor(DisruptorQueue.java:128)
 ~[storm-core-0.9.3.jar:0.9.3]        at 
backtype.storm.utils.DisruptorQueue.consumeBatchWhenAvailable(DisruptorQueue.java:99)
 ~[storm-core-0.9.3.jar:0.9.3]        at 
backtype.storm.disruptor$consume_batch_when_available.invoke(disruptor.clj:80) 
~[storm-core-0.9.3.jar:0.9.3]        at 
backtype.storm.disruptor$consume_loop_STAR_$fn__759.invoke(disruptor.clj:94) 
~[storm-core-0.9.3.jar:0.9.3]        at 
backtype.storm.util$async_loop$fn__458.invoke(util.clj:463) 
~[storm-core-0.9.3.jar:0.9.3]        at clojure.lang.AFn.run(AFn.java:24) 
[clojure-1.5.1.jar:na]        at java.lang.Thread.run(Thread.java:745) 
[na:1.7.0_65]Caused by: java.lang.NullPointerException: null        at 
clojure.lang.RT.intCast(RT.java:1087) ~[clojure-1.5.1.jar:na]        at 
backtype.storm.daemon.worker$mk_transfer_fn$fn__3548.invoke(worker.clj:129) 
~[storm-core-0.9.3.jar:0.9.3]        at 
backtype.storm.daemon.executor$start_batch_transfer__GT_worker_handler_BANG_$fn__3282.invoke(executor.clj:258)
 ~[storm-core-0.9.3.jar:0.9.3]        at 
backtype.storm.disruptor$clojure_handler$reify__746.onEvent(disruptor.clj:58) 
~[storm-core-0.9.3.jar:0.9.3]        at 
backtype.storm.utils.DisruptorQueue.consumeBatchToCursor(DisruptorQueue.java:125)
 ~[storm-core-0.9.3.jar:0.9.3]        ... 6 common frames omitted1059203 
[Thread-76-disruptor-executor[34 34]-send-queue] ERROR 
backtype.storm.daemon.executor -java.lang.RuntimeException: 
java.lang.NullPointerException        at 
backtype.storm.utils.DisruptorQueue.consumeBatchToCursor(DisruptorQueue.java:128)
 ~[storm-core-0.9.3.jar:0.9.3]        at 
backtype.storm.utils.DisruptorQueue.consumeBatchWhenAvailable(DisruptorQueue.java:99)
 ~[storm-core-0.9.3.jar:0.9.3]        at 
backtype.storm.disruptor$consume_batch_when_available.invoke(disruptor.clj:80) 
~[storm-core-0.9.3.jar:0.9.3]        at 
backtype.storm.disruptor$consume_loop_STAR_$fn__759.invoke(disruptor.clj:94) 
~[storm-core-0.9.3.jar:0.9.3]        at 
backtype.storm.util$async_loop$fn__458.invoke(util.clj:463) 
~[storm-core-0.9.3.jar:0.9.3]        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_65]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__3548.invoke(worker.clj:129) 
~[storm-core-0.9.3.jar:0.9.3]        at 
backtype.storm.daemon.executor$start_batch_transfer__GT_worker_handler_BANG_$fn__3282.invoke(executor.clj:258)
 ~[storm-core-0.9.3.jar:0.9.3]        at 
backtype.storm.disruptor$clojure_handler$reify__746.onEvent(disruptor.clj:58) 
~[storm-core-0.9.3.jar:0.9.3]        at 
backtype.storm.utils.DisruptorQueue.consumeBatchToCursor(DisruptorQueue.java:125)
 ~[storm-core-0.9.3.jar:0.9.3]        ... 6 common frames omitted1060135 
[Thread-76-disruptor-executor[34 34]-send-queue] ERROR backtype.storm.util - 
Halting process: ("Worker died")java.lang.RuntimeException: ("Worker died")     
   at backtype.storm.util$exit_process_BANG_.doInvoke(util.clj:325) 
[storm-core-0.9.3.jar:0.9.3]        at 
clojure.lang.RestFn.invoke(RestFn.java:423) [clojure-1.5.1.jar:na]        at 
backtype.storm.daemon.worker$fn__3807$fn__3808.invoke(worker.clj:452) 
[storm-core-0.9.3.jar:0.9.3]        at 
backtype.storm.daemon.executor$mk_executor_data$fn__3273$fn__3274.invoke(executor.clj:240)
 [storm-core-0.9.3.jar:0.9.3]        at 
backtype.storm.util$async_loop$fn__458.invoke(util.clj:473) 
[storm-core-0.9.3.jar:0.9.3]        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_65]


   

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