[jira] [Created] (FLINK-22553) Improve error reporting on TM connection failures

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[jira] [Created] (FLINK-22553) Improve error reporting on TM connection failures

Shang Yuanchun (Jira)
Roman Khachatryan created FLINK-22553:
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             Summary: Improve error reporting on TM connection failures
                 Key: FLINK-22553
                 URL: https://issues.apache.org/jira/browse/FLINK-22553
             Project: Flink
          Issue Type: Improvement
          Components: Runtime / Network
            Reporter: Roman Khachatryan
             Fix For: 1.14.0


Connection failures reported by NettyPartitionRequestClient contain misleading NPE in their stacktrace, e.g. reported in http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/remote-task-manager-netty-exception-td43401.html
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org.apache.flink.runtime.io.network.netty.exception.RemoteTransportException: Connecting to remote task manager '/100.98.115.117:41245' has failed. This might indicate that the remote task manager has been lost.
at org.apache.flink.runtime.io.network.netty.PartitionRequestClientFactory.connect(PartitionRequestClientFactory.java:145) ~[flink-dist_2.12-1.12.2.jar:1.12.2]
at org.apache.flink.runtime.io.network.netty.PartitionRequestClientFactory.connectWithRetries(PartitionRequestClientFactory.java:114) ~[flink-dist_2.12-1.12.2.jar:1.12.2]
at org.apache.flink.runtime.io.network.netty.PartitionRequestClientFactory.createPartitionRequestClient(PartitionRequestClientFactory.java:81) ~[flink-dist_2.12-1.12.2.jar:1.12.2]
at org.apache.flink.runtime.io.network.netty.NettyConnectionManager.createPartitionRequestClient(NettyConnectionManager.java:70) ~[flink-dist_2.12-1.12.2.jar:1.12.2]
at org.apache.flink.runtime.io.network.partition.consumer.RemoteInputChannel.requestSubpartition(RemoteInputChannel.java:179) ~[flink-dist_2.12-1.12.2.jar:1.12.2]
at org.apache.flink.runtime.io.network.partition.consumer.SingleInputGate.internalRequestPartitions(SingleInputGate.java:321) ~[flink-dist_2.12-1.12.2.jar:1.12.2]
at org.apache.flink.runtime.io.network.partition.consumer.SingleInputGate.requestPartitions(SingleInputGate.java:290) ~[flink-dist_2.12-1.12.2.jar:1.12.2]
at org.apache.flink.runtime.taskmanager.InputGateWithMetrics.requestPartitions(InputGateWithMetrics.java:94) ~[flink-dist_2.12-1.12.2.jar:1.12.2]
at org.apache.flink.streaming.runtime.tasks.StreamTaskActionExecutor$1.runThrowing(StreamTaskActionExecutor.java:50) [flink-dist_2.12-1.12.2.jar:1.12.2]
at org.apache.flink.streaming.runtime.tasks.mailbox.Mail.run(Mail.java:90) [flink-dist_2.12-1.12.2.jar:1.12.2]
at org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.processMail(MailboxProcessor.java:297) [flink-dist_2.12-1.12.2.jar:1.12.2]
at org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxLoop(MailboxProcessor.java:189) [flink-dist_2.12-1.12.2.jar:1.12.2]
at org.apache.flink.streaming.runtime.tasks.StreamTask.runMailboxLoop(StreamTask.java:617) [flink-dist_2.12-1.12.2.jar:1.12.2]
at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:581) [flink-dist_2.12-1.12.2.jar:1.12.2]
at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:755) [flink-dist_2.12-1.12.2.jar:1.12.2]
at org.apache.flink.runtime.taskmanager.Task.run(Task.java:570) [flink-dist_2.12-1.12.2.jar:1.12.2]
at java.lang.Thread.run(Thread.java:834) [?:?]Caused by: java.lang.NullPointerException
at org.apache.flink.util.Preconditions.checkNotNull(Preconditions.java:59) ~[flink-dist_2.12-1.12.2.jar:1.12.2]
at org.apache.flink.runtime.io.network.netty.NettyPartitionRequestClient.<init>(NettyPartitionRequestClient.java:74) ~[flink-dist_2.12-1.12.2.jar:1.12.2]
at org.apache.flink.runtime.io.network.netty.PartitionRequestClientFactory.connect(PartitionRequestClientFactory.java:136) ~[flink-dist_2.12-1.12.2.jar:1.12.2] ... 16 more
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