[ https://issues.apache.org/jira/browse/FLINK-8498?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Tzu-Li (Gordon) Tai updated FLINK-8498: --------------------------------------- Fix Version/s: (was: 1.4.1) 1.4.2 > GetExecutionPlan fails with IllegalArgumentException in Comparator > ------------------------------------------------------------------ > > Key: FLINK-8498 > URL: https://issues.apache.org/jira/browse/FLINK-8498 > Project: Flink > Issue Type: Bug > Components: DataStream API > Affects Versions: 1.3.2 > Reporter: Julian Bauß > Priority: Major > Fix For: 1.5.0, 1.4.2 > > > Hello everybody, > we're currently encountering an exception while generating an ExecutionGraph > JSON in Flink v1.3.2. > Actually executing the job does not cause an exception and everything works > as inteded. > > This happens since we started adding side-outputs to many of our operators. > > Below is the stacktrace. The problem seems to be a contract violation in the > comparator implementation. > > {code:java} > org.apache.flink.client.program.ProgramInvocationException: The main method > caused an error. > at > org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:545) > at > org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:419) > at > org.apache.flink.client.program.ClusterClient.run(ClusterClient.java:381) > at > org.apache.flink.client.CliFrontend.executeProgram(CliFrontend.java:838) > at org.apache.flink.client.CliFrontend.run(CliFrontend.java:259) > at > org.apache.flink.client.CliFrontend.parseParameters(CliFrontend.java:1086) > at org.apache.flink.client.CliFrontend$2.call(CliFrontend.java:1133) > at org.apache.flink.client.CliFrontend$2.call(CliFrontend.java:1130) > at > org.apache.flink.runtime.security.HadoopSecurityContext$1.run(HadoopSecurityContext.java:43) > at java.security.AccessController.doPrivileged(Native Method) > at javax.security.auth.Subject.doAs(Subject.java:422) > at > org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1656) > at > org.apache.flink.runtime.security.HadoopSecurityContext.runSecured(HadoopSecurityContext.java:40) > at org.apache.flink.client.CliFrontend.main(CliFrontend.java:1130) > Caused by: java.lang.RuntimeException: JSON plan creation failed > at > org.apache.flink.streaming.api.graph.StreamGraph.getStreamingPlanAsJSON(StreamGraph.java:668) > at > org.apache.flink.streaming.api.environment.StreamExecutionEnvironment.getExecutionPlan(StreamExecutionEnvironment.java:1538) > at com.example.Main.main(Main.java:262) > 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.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:528) > ... 13 more > Caused by: java.lang.IllegalArgumentException: Comparison method violates its > general contract! > at java.util.TimSort.mergeLo(TimSort.java:777) > at java.util.TimSort.mergeAt(TimSort.java:514) > at java.util.TimSort.mergeCollapse(TimSort.java:441) > at java.util.TimSort.sort(TimSort.java:245) > at java.util.Arrays.sort(Arrays.java:1512) > at java.util.ArrayList.sort(ArrayList.java:1454) > at java.util.Collections.sort(Collections.java:175) > at > org.apache.flink.streaming.api.graph.JSONGenerator.getJSON(JSONGenerator.java:60) > at > org.apache.flink.streaming.api.graph.StreamGraph.getStreamingPlanAsJSON(StreamGraph.java:665) > ... 21 more > {code} > > > Best Regards, > > Julian -- This message was sent by Atlassian JIRA (v7.6.3#76005)