[jira] [Created] (FLINK-1251) CollectionInputFormat is not able to handle Enums

[Shang Yuanchun (Jira)]

Robert Metzger created FLINK-1251:
-------------------------------------

             Summary: CollectionInputFormat is not able to handle Enums
                 Key: FLINK-1251
                 URL: https://issues.apache.org/jira/browse/FLINK-1251
             Project: Flink
          Issue Type: Bug
            Reporter: Robert Metzger


It seems that the CollectionInputFormat is not able to handle POJOs containing enums properly.

{code}
        public enum Category {
                CAT_A, CAT_B;
        }

        public static class PojoWithDateAndEnum {
                public String group;
                public Date date;
                public Category cat;
        }
{code}

leads to
{code}
java.lang.IllegalStateException: unread block data
        at java.io.ObjectInputStream$BlockDataInputStream.setBlockDataMode(ObjectInputStream.java:2424)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1383)
        at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1993)
        at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1918)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1801)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1351)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:371)
        at org.apache.flink.util.InstantiationUtil.deserializeObject(InstantiationUtil.java:245)
        at org.apache.flink.util.InstantiationUtil.readObjectFromConfig(InstantiationUtil.java:231)
        at org.apache.flink.runtime.operators.util.TaskConfig.getStubWrapper(TaskConfig.java:281)
        at org.apache.flink.runtime.jobgraph.InputFormatVertex.initializeOnMaster(InputFormatVertex.java:46)
        at org.apache.flink.runtime.jobmanager.JobManager.submitJob(JobManager.java:380)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:483)
        at org.apache.flink.runtime.ipc.RPC$Server.call(RPC.java:420)
        at org.apache.flink.runtime.ipc.Server$Handler.run(Server.java:947)

org.apache.flink.runtime.client.JobExecutionException: java.lang.IllegalStateException: unread block data
        at java.io.ObjectInputStream$BlockDataInputStream.setBlockDataMode(ObjectInputStream.java:2424)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1383)
        at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1993)
        at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1918)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1801)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1351)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:371)
        at org.apache.flink.util.InstantiationUtil.deserializeObject(InstantiationUtil.java:245)
        at org.apache.flink.util.InstantiationUtil.readObjectFromConfig(InstantiationUtil.java:231)
        at org.apache.flink.runtime.operators.util.TaskConfig.getStubWrapper(TaskConfig.java:281)
        at org.apache.flink.runtime.jobgraph.InputFormatVertex.initializeOnMaster(InputFormatVertex.java:46)
        at org.apache.flink.runtime.jobmanager.JobManager.submitJob(JobManager.java:380)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:483)
        at org.apache.flink.runtime.ipc.RPC$Server.call(RPC.java:420)
        at org.apache.flink.runtime.ipc.Server$Handler.run(Server.java:947)

        at org.apache.flink.runtime.client.JobClient.submitJobAndWait(JobClient.java:256)
        at org.apache.flink.test.util.JavaProgramTestBase$TestEnvironment.execute(JavaProgramTestBase.java:216)
        at org.apache.flink.api.java.ExecutionEnvironment.execute(ExecutionEnvironment.java:578)
        at org.apache.flink.test.javaApiOperators.ReduceITCase$ReduceProgs.runProgram(ReduceITCase.java:364)
        at org.apache.flink.test.javaApiOperators.ReduceITCase.testProgram(ReduceITCase.java:66)
        at org.apache.flink.test.util.JavaProgramTestBase.testJob(JavaProgramTestBase.java:121)
{code}

I don't know if this is related: https://bugs.openjdk.java.net/browse/JDK-7132873



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