eolivelli opened a new issue #13358:
URL: https://github.com/apache/pulsar/issues/13358
**Describe the bug**
I have seen this NPE in FunctionStatsManager.reset.
Probably it is a race while the function is still starting and it receives a
"reset" request
**To Reproduce**
It is hard to reproduce it manually.
**Expected behavior**
No error
**Screenshots**
```
16:55:26.404 [function-timer-thread-6-1] ERROR
org.apache.pulsar.functions.instance.stats.ComponentStatsManager - Failed to
reset metrics for 1min window
java.lang.NullPointerException: null
at
org.apache.pulsar.functions.instance.stats.FunctionStatsManager.reset(FunctionStatsManager.java:425)
~[com.datastax.oss-pulsar-functions-instance-2.7.2.1.1.21.jar:2.7.2.1.1.21]
at
org.apache.pulsar.functions.instance.stats.ComponentStatsManager.lambda$new$0(ComponentStatsManager.java:81)
~[com.datastax.oss-pulsar-functions-instance-2.7.2.1.1.21.jar:2.7.2.1.1.21]
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) [?:?]
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305) [?:?]
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305)
[?:?]
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
[?:?]
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
[?:?]
at
io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
[java-instance.jar:?]
at java.lang.Thread.run(Thread.java:829) [?:?]
```
**Envrironment (please complete the following information):**
Pulsar 2.7.2 (actually Luna Streaming fork 2.7.2.1.1.21, but the code is the
same as in Pulsar 2.7.2)
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