Fabian Hueske created FLINK-19398:
-------------------------------------
Summary: Hive connector fails with IllegalAccessError if submitted
as usercode
Key: FLINK-19398
URL: https://issues.apache.org/jira/browse/FLINK-19398
Project: Flink
Issue Type: Bug
Components: Connectors / Hive
Affects Versions: 1.11.2, 1.12.0
Reporter: Fabian Hueske
Using Flink's Hive connector fails if the dependency is loaded with the user
code classloader with the following exception.
{code:java}
java.lang.IllegalAccessError: tried to access method
org.apache.flink.streaming.api.functions.sink.filesystem.Buckets.<init>(Lorg/apache/flink/core/fs/Path;Lorg/apache/flink/streaming/api/functions/sink/filesystem/BucketAssigner;Lorg/apache/flink/streaming/api/functions/sink/filesystem/BucketFactory;Lorg/apache/flink/streaming/api/functions/sink/filesystem/BucketWriter;Lorg/apache/flink/streaming/api/functions/sink/filesystem/RollingPolicy;ILorg/apache/flink/streaming/api/functions/sink/filesystem/OutputFileConfig;)V
from class
org.apache.flink.streaming.api.functions.sink.filesystem.HadoopPathBasedBulkFormatBuilder
at
org.apache.flink.streaming.api.functions.sink.filesystem.HadoopPathBasedBulkFormatBuilder.createBuckets(HadoopPathBasedBulkFormatBuilder.java:127)
~[flink-connector-hive_2.12-1.11.2-stream2-SNAPSHOT.jar:1.11.2-stream2-SNAPSHOT]
at
org.apache.flink.table.filesystem.stream.StreamingFileWriter.initializeState(StreamingFileWriter.java:81)
~[flink-table-blink_2.12-1.11.2-stream2-SNAPSHOT.jar:1.11.2-stream2-SNAPSHOT]
at
org.apache.flink.streaming.api.operators.StreamOperatorStateHandler.initializeOperatorState(StreamOperatorStateHandler.java:106)
~[flink-dist_2.12-1.11.2-stream2-SNAPSHOT.jar:1.11.2-stream2-SNAPSHOT]
at
org.apache.flink.streaming.api.operators.AbstractStreamOperator.initializeState(AbstractStreamOperator.java:258)
~[flink-dist_2.12-1.11.2-stream2-SNAPSHOT.jar:1.11.2-stream2-SNAPSHOT]
at
org.apache.flink.streaming.runtime.tasks.OperatorChain.initializeStateAndOpenOperators(OperatorChain.java:290)
~[flink-dist_2.12-1.11.2-stream2-SNAPSHOT.jar:1.11.2-stream2-SNAPSHOT]
at
org.apache.flink.streaming.runtime.tasks.StreamTask.lambda$beforeInvoke$0(StreamTask.java:479)
~[flink-dist_2.12-1.11.2-stream2-SNAPSHOT.jar:1.11.2-stream2-SNAPSHOT]
at
org.apache.flink.streaming.runtime.tasks.StreamTaskActionExecutor$SynchronizedStreamTaskActionExecutor.runThrowing(StreamTaskActionExecutor.java:92)
~[flink-dist_2.12-1.11.2-stream2-SNAPSHOT.jar:1.11.2-stream2-SNAPSHOT]
at
org.apache.flink.streaming.runtime.tasks.StreamTask.beforeInvoke(StreamTask.java:475)
~[flink-dist_2.12-1.11.2-stream2-SNAPSHOT.jar:1.11.2-stream2-SNAPSHOT]
at
org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:528)
~[flink-dist_2.12-1.11.2-stream2-SNAPSHOT.jar:1.11.2-stream2-SNAPSHOT]
at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:721)
[flink-dist_2.12-1.11.2-stream2-SNAPSHOT.jar:1.11.2-stream2-SNAPSHOT]
at org.apache.flink.runtime.taskmanager.Task.run(Task.java:546)
[flink-dist_2.12-1.11.2-stream2-SNAPSHOT.jar:1.11.2-stream2-SNAPSHOT]
{code}
The problem is the constructor of {{Buckets}} with default visibility which is
called from {{HadoopPathBasedBulkFormatBuilder}} . This works as long as both
classes are loaded with the same classloader but when they are loaded in
different classloaders, the access fails.
{{Buckets}} is loaded with the system CL because it is part of
flink-streaming-java.
To solve this issue, we should change the visibility of the {{Buckets}}
constructor to {{public}}.
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