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https://issues.apache.org/jira/browse/PIG-5387?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16843746#comment-16843746
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Adam Szita commented on PIG-5387:
---------------------------------
Thanks Nandor, +1 for [^PIG-5387_3.patch]. [~rohini], [~knoguchi] any
objections?
> Test failures on JRE 11
> -----------------------
>
> Key: PIG-5387
> URL: https://issues.apache.org/jira/browse/PIG-5387
> Project: Pig
> Issue Type: Bug
> Affects Versions: 0.17.0
> Reporter: Nandor Kollar
> Assignee: Nandor Kollar
> Priority: Major
> Attachments: PIG-5387_1.patch, PIG-5387_2.patch, PIG-5387_3.patch
>
>
> I tried to compile Pig with JDK 8 and execute the test with Java 11, and
> faced with several test failures. For example TestCommit#testCheckin2 failed
> with the following exception:
> {code}
> 2019-05-08 16:06:09,712 WARN [Thread-108] mapred.LocalJobRunner
> (LocalJobRunner.java:run(590)) - job_local1000317333_0003
> java.lang.Exception: java.io.IOException: Deserialization error: null
> at
> org.apache.hadoop.mapred.LocalJobRunner$Job.runTasks(LocalJobRunner.java:492)
> at
> org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:552)
> Caused by: java.io.IOException: Deserialization error: null
> at
> org.apache.pig.impl.util.ObjectSerializer.deserialize(ObjectSerializer.java:62)
> at
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapBase.setup(PigGenericMapBase.java:183)
> at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:143)
> at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:799)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:347)
> at
> org.apache.hadoop.mapred.LocalJobRunner$Job$MapTaskRunnable.run(LocalJobRunner.java:271)
> at
> java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
> at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
> at
> java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
> at
> java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
> at java.base/java.lang.Thread.run(Thread.java:834)
> Caused by: java.lang.NullPointerException
> at org.apache.pig.impl.plan.Operator.hashCode(Operator.java:106)
> at java.base/java.util.HashMap.hash(HashMap.java:339)
> at java.base/java.util.HashMap.readObject(HashMap.java:1461)
> at
> java.base/jdk.internal.reflect.GeneratedMethodAccessor12.invoke(Unknown
> Source)
> at
> java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.base/java.lang.reflect.Method.invoke(Method.java:566)
> at
> java.base/java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1160)
> {code}
> It deserialization of one of the map plan failed, it appears we ran into
> [JDK-8201131|https://bugs.openjdk.java.net/browse/JDK-8201131]. I seems that
> the workaround in the issue report works, adding a readObject method to
> org.apache.pig.impl.plan.Operator:
> {code}
> private void readObject(ObjectInputStream in) throws
> ClassNotFoundException, IOException {
> in.defaultReadObject();
> }
> {code}
> solves the problem, however I'm not sure that this is the optimal solution.
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