fx19880617 opened a new issue #5565:
URL: https://github.com/apache/incubator-pinot/issues/5565
Currently we don't see timeout exception in pinot query exceptions.
Sometimes we just see pure empty response, and sometime we see the message
below, which shows no clue of this is timeout and users need to see Pinot
server log to identify the real issue is timeout.
This also prevents client side to retry on certain exceptions.
```
{"errorCode":200,"message":"QueryExecutionError:\njava.lang.RuntimeException:
Caught exception while running CombinePlanNode.\n\tat
org.apache.pinot.core.plan.CombinePlanNode.run(CombinePlanNode.java:148)\n\tat
org.apache.pinot.core.plan.InstanceResponsePlanNode.run(InstanceResponsePlanNode.java:38)\n\tat
org.apache.pinot.core.plan.GlobalPlanImplV0.execute(GlobalPlanImplV0.java:45)\n\tat
org.apache.pinot.core.query.executor.ServerQueryExecutorV1Impl.processQuery(ServerQueryExecutorV1Impl.java:213)\n\tat
org.apache.pinot.core.query.scheduler.QueryScheduler.processQueryAndSerialize(QueryScheduler.java:152)\n\tat
org.apache.pinot.core.query.scheduler.QueryScheduler.lambda$createQueryFutureTask$0(QueryScheduler.java:136)\n\tat
java.util.concurrent.FutureTask.run(FutureTask.java:266)\n\tat
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)\n\tat
shaded.com.google.common.util.concurrent.TrustedListenableFutureTask$TrustedFutureInterruptibleTask.runInterruptibly(TrustedListenableFutureTask.java:111)\n\tat
shaded.com.google.common.util.concurrent.InterruptibleTask.run(InterruptibleTask.java:58)\n\tat
shaded.com.google.common.util.concurrent.TrustedListenableFutureTask.run(TrustedListenableFutureTask.java:75)\n\tat
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)\n\tat
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)\n\tat
java.lang.Thread.run(Thread.java:748)"}
```
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