LantaoJin opened a new pull request #25810: [SPARK-29112][YARN] Expose more details when ApplicationMaster reporter faces a fatal exception URL: https://github.com/apache/spark/pull/25810 ### What changes were proposed in this pull request? In `ApplicationMaster.Reporter` thread, fatal exception information is swallowed. It's better to expose it. We found our thrift server was shutdown due to a fatal exception but no useful information from log. > 19/09/16 06:59:54,498 INFO [Reporter] yarn.ApplicationMaster:54 : Final app status: FAILED, exitCode: 12, (reason: Exception was thrown 1 time(s) from Reporter thread.) 19/09/16 06:59:54,500 ERROR [Driver] thriftserver.HiveThriftServer2:91 : Error starting HiveThriftServer2 java.lang.InterruptedException: sleep interrupted at java.lang.Thread.sleep(Native Method) at org.apache.spark.sql.hive.thriftserver.HiveThriftServer2$.main(HiveThriftServer2.scala:160) at org.apache.spark.sql.hive.thriftserver.HiveThriftServer2.main(HiveThriftServer2.scala) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.spark.deploy.yarn.ApplicationMaster$$anon$4.run(ApplicationMaster.scala:708) ### Does this PR introduce any user-facing change? No ### How was this patch tested? Manual test
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