Chesnay Schepler created FLINK-5612:
---------------------------------------
Summary: GlobPathFilter not-serializable exception
Key: FLINK-5612
URL: https://issues.apache.org/jira/browse/FLINK-5612
Project: Flink
Issue Type: Bug
Components: Batch Connectors and Input/Output Formats
Affects Versions: 1.2.0, 1.3.0
Reporter: Chesnay Schepler
Priority: Blocker
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(...).
{code}
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");
}
{code}
{code}
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
{code}
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