Nandor Kollar created PIG-5387:
----------------------------------
Summary: 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
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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