# NPE (minor?)

**URL:** <https://discuss.elastic.co/t/npe-minor/3910>\
**Category:** Elasticsearch\
**Created:** [February 10, 2011, 11:44pm UTC](https://discuss.elastic.co/t/npe-minor/3910 "2011-02-10T23:44:05Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Karussell1](https://avatars.discourse-cdn.com/v4/letter/k/50afbb/32.png) [@Karussell1](https://discuss.elastic.co/u/Karussell1)\
**Post date:** [February 10, 2011, 11:44pm UTC](https://discuss.elastic.co/t/npe-minor/3910/1 "2011-02-10T23:44:05Z")

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just saw a NPE in the logs of the server (latest version from git)  
which is printed every second:

... failed to run org.elasticsearch.monitor.jvm.JvmMonitorService  
$JvmMonitor@847821  
java.lang.NullPointerException  
at org.elasticsearch.monitor.jvm.JvmMonitorService  
$JvmMonitor.monitorLongGc(JvmMonitorService.java:107)  
at org.elasticsearch.monitor.jvm.JvmMonitorService  
$JvmMonitor.run(JvmMonitorService.java:97)  
at org.elasticsearch.threadpool.support.AbstractThreadPool  
$LoggingRunnable.run(AbstractThreadPool.java:129)  
at java.util.concurrent.Executors  
$RunnableAdapter.call(Executors.java:441)  
at java.util.concurrent.FutureTask  
$Sync.innerRunAndReset(FutureTask.java:317)  
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:  
150)  
at java.util.concurrent.ScheduledThreadPoolExecutor  
$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98)  
at java.util.concurrent.ScheduledThreadPoolExecutor  
$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:180)  
at java.util.concurrent.ScheduledThreadPoolExecutor  
$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:204)  
at java.util.concurrent.ThreadPoolExecutor  
$Worker.runTask(ThreadPoolExecutor.java:886)  
at java.util.concurrent.ThreadPoolExecutor  
$Worker.run(ThreadPoolExecutor.java:908)  
at java.lang.Thread.run(Thread.java:662)

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 6, 2017, 4:12am UTC](https://discuss.elastic.co/t/npe-minor/3910/2 "2017-07-06T04:12:13Z")

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Closed on July 6, 2017, 4:12am UTC