clintropolis edited a comment on pull request #12032:
URL: https://github.com/apache/druid/pull/12032#issuecomment-1006132338


   it looks like a handful of integration tests perhaps have legitimate 
failures, though they all look similar-ish: exceptions that occur from some 
underlying network failure, so hopefully it isn't something very involved and 
just missing a catch or some form of exception handling somewhere
   
   examples:
   
   ```
   [ERROR] Tests run: 4, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 
897.106 s <<< FAILURE! - in TestSuite
   [ERROR] 
testKafkaIndexDataWithStartStopSupervisor(org.apache.druid.tests.parallelized.ITKafkaIndexingServiceNonTransactionalParallelizedTest)
  Time elapsed: 176.157 s
   [ERROR] 
testKafkaIndexDataWithKafkaReshardSplit(org.apache.druid.tests.parallelized.ITKafkaIndexingServiceNonTransactionalParallelizedTest)
  Time elapsed: 1.738 s
   [ERROR] 
testKafkaTerminatedSupervisorAutoCleanup(org.apache.druid.tests.parallelized.ITKafkaIndexingServiceNonTransactionalParallelizedTest)
  Time elapsed: 158.769 s
   [ERROR] 
testKafkaIndexDataWithWithAutoscaler(org.apache.druid.tests.parallelized.ITKafkaIndexingServiceNonTransactionalParallelizedTest)
  Time elapsed: 602.337 s  <<< FAILURE!
   java.lang.RuntimeException: 
   org.apache.druid.java.util.common.ISE: Error while 
querying[https://127.0.0.1:8282/druid/v2?pretty] status[500 Internal Server 
Error] content[{
     "error" : "Unknown exception",
     "errorMessage" : "Channel disconnected",
     "errorClass" : "io.netty.channel.ChannelException",
     "host" : "druid-middlemanager:8103"
   }]
   ```
   
   ```
   [ERROR] Tests run: 3, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 
532.75 s <<< FAILURE! - in TestSuite
   [ERROR] 
testKafkaIndexDataWithLosingCoordinator(org.apache.druid.tests.indexer.ITKafkaIndexingServiceNonTransactionalSerializedTest)
  Time elapsed: 123.614 s
   [ERROR] 
testKafkaIndexDataWithLosingHistorical(org.apache.druid.tests.indexer.ITKafkaIndexingServiceNonTransactionalSerializedTest)
  Time elapsed: 153.584 s  <<< FAILURE!
   java.lang.RuntimeException: 
   org.apache.druid.java.util.common.ISE: Error while 
querying[http://127.0.0.1:8082/druid/v2?pretty] status[500 Internal Server 
Error] content[{
     "error" : "Unknown exception",
     "errorMessage" : "Channel disconnected",
     "errorClass" : "io.netty.channel.ChannelException",
     "host" : "druid-middlemanager:8103"
   }]
   ```
   
   and 
   
   ```
   [ERROR] 
testIndexData(org.apache.druid.tests.indexer.ITNestedQueryPushDownTest)  Time 
elapsed: 30.879 s  <<< FAILURE!
   java.lang.RuntimeException: java.lang.RuntimeException: 
java.util.concurrent.ExecutionException: java.io.IOException: Connection reset 
by peer
        at 
org.apache.druid.tests.indexer.ITNestedQueryPushDownTest.testIndexData(ITNestedQueryPushDownTest.java:96)
   Caused by: java.lang.RuntimeException: 
java.util.concurrent.ExecutionException: java.io.IOException: Connection reset 
by peer
        at 
org.apache.druid.tests.indexer.ITNestedQueryPushDownTest.testIndexData(ITNestedQueryPushDownTest.java:92)
   Caused by: java.util.concurrent.ExecutionException: java.io.IOException: 
Connection reset by peer
        at 
org.apache.druid.tests.indexer.ITNestedQueryPushDownTest.testIndexData(ITNestedQueryPushDownTest.java:92)
   Caused by: java.io.IOException: Connection reset by peer
   ```
   
   i haven't had a chance to dig in yet, so not sure the exact issue


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