liunaijie commented on issue #8053:
URL: https://github.com/apache/seatunnel/issues/8053#issuecomment-2475815543
I got similar issue today.
My version is 2.3.5
My error stack is
```
java.util.concurrent.CompletionException: java.lang.RuntimeException:
java.util.concurrent.ExecutionException: java.lang.NullPointerException
at
com.hazelcast.spi.impl.AbstractInvocationFuture.returnOrThrowWithJoinConventions(AbstractInvocationFuture.java:819)
~[seatunnel-starter.jar:2.3.5]
at
com.hazelcast.spi.impl.AbstractInvocationFuture.resolveAndThrowWithJoinConvention(AbstractInvocationFuture.java:835)
~[seatunnel-starter.jar:2.3.5]
at
com.hazelcast.spi.impl.AbstractInvocationFuture.join(AbstractInvocationFuture.java:553)
~[seatunnel-starter.jar:2.3.5]
at
org.apache.seatunnel.engine.server.rest.RestHttpGetCommandProcessor.convertToJson(RestHttpGetCommandProcessor.java:392)
~[seatunnel-starter.jar:2.3.5]
at
org.apache.seatunnel.engine.server.rest.RestHttpGetCommandProcessor.lambda$handleRunningJobsInfo$2(RestHttpGetCommandProcessor.java:173)
~[seatunnel-starter.jar:2.3.5]
at
java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
~[?:1.8.0_342]
```
It's called from restapi, `/hazelcast/rest/maps/running-jobs`.
And it looks NPE is generate from here
https://github.com/apache/seatunnel/blob/dev/seatunnel-engine/seatunnel-engine-server/src/main/java/org/apache/seatunnel/engine/server/master/JobHistoryService.java#L186
If the job is not running and also can't find in history service. it will
return `null`
so when call `jobMetrics..getMetrics()` it will be `null..getMetrics()` then
get NPE.
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