[FLINK-5612] GlobPathFilter not-serializable exception

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 1.2.0, 1.3.0
• Fix Version/s: 1.2.0, 1.3.0
• Component/s: API / DataSet
• Assignee: Ivan Mushketyk
• Reporter: Chesnay Schepler
• Created: 23/Jan/17 10:37
• Updated: 28/Feb/19 13:46
• Resolved: 27/Jan/17 15:09

Description

A user reported on the mailing list a non-serializable exception when using the GlobFIlePathFilters.

It appears that the PathMatchers are all created as anonymous inner classes and thus contain a reference to the encapsulating, non-serializable FileSystem class.

We can fix this by moving the Matcher instantiation into filterPath(...).

public static void main(String[] args) throws Exception {

    final ExecutionEnvironment env =
ExecutionEnvironment.getExecutionEnvironment();
    final TextInputFormat format = new TextInputFormat(new Path("/temp"));

    format.setFilesFilter(new GlobFilePathFilter(
            Collections.singletonList("**"),
            Arrays.asList("**/another_file.bin", "**/dataFile1.txt")
    ));

    DataSet<String> result = env.readFile(format,"/tmp");
    result.writeAsText("/temp/out");
    env.execute("GlobFilePathFilter-Test");

}

Exception in thread "main" org.apache.flink.optimizer.CompilerException:
Error translating node 'Data Source "at
readFile(ExecutionEnvironment.java:520)
(org.apache.flink.api.java.io.TextInputFormat)" : NONE [[ GlobalProperties
[partitioning=RANDOM_PARTITIONED] ]] [[ LocalProperties [ordering=null,
grouped=null, unique=null] ]]': Could not write the user code wrapper class
org.apache.flink.api.common.operators.util.UserCodeObjectWrapper :
java.io.NotSerializableException: sun.nio.fs.UnixFileSystem$3
at
org.apache.flink.optimizer.plantranslate.JobGraphGenerator.preVisit(JobGraphGenerator.java:381)
at
org.apache.flink.optimizer.plantranslate.JobGraphGenerator.preVisit(JobGraphGenerator.java:106)
at
org.apache.flink.optimizer.plan.SourcePlanNode.accept(SourcePlanNode.java:86)
at
org.apache.flink.optimizer.plan.SingleInputPlanNode.accept(SingleInputPlanNode.java:199)
at
org.apache.flink.optimizer.plan.OptimizedPlan.accept(OptimizedPlan.java:128)
at
org.apache.flink.optimizer.plantranslate.JobGraphGenerator.compileJobGraph(JobGraphGenerator.java:192)
at org.apache.flink.client.LocalExecutor.executePlan(LocalExecutor.java:188)
at
org.apache.flink.api.java.LocalEnvironment.execute(LocalEnvironment.java:91)
at com.apsaltis.EventDetectionJob.main(EventDetectionJob.java:75)
Caused by:
org.apache.flink.runtime.operators.util.CorruptConfigurationException:
Could not write the user code wrapper class
org.apache.flink.api.common.operators.util.UserCodeObjectWrapper :
java.io.NotSerializableException: sun.nio.fs.UnixFileSystem$3
at
org.apache.flink.runtime.operators.util.TaskConfig.setStubWrapper(TaskConfig.java:281)
at
org.apache.flink.optimizer.plantranslate.JobGraphGenerator.createDataSourceVertex(JobGraphGenerator.java:888)
at
org.apache.flink.optimizer.plantranslate.JobGraphGenerator.preVisit(JobGraphGenerator.java:281)
... 8 more
Caused by: java.io.NotSerializableException: sun.nio.fs.UnixFileSystem$3
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1184)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
at java.util.ArrayList.writeObject(ArrayList.java:747)
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 java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:988)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1496)
at
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
at
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)
at
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
at
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)
at
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
at
java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)
at
java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
at
org.apache.flink.util.InstantiationUtil.serializeObject(InstantiationUtil.java:317)
at
org.apache.flink.util.InstantiationUtil.writeObjectToConfig(InstantiationUtil.java:254)
at
org.apache.flink.runtime.operators.util.TaskConfig.setStubWrapper(TaskConfig.java:279)
... 10 more

Issue Links

• links to: GitHub Pull Request #3206