GitHub user tillrohrmann opened a pull request:
https://github.com/apache/flink/pull/1368
[FLINK-3021] Fix class loading issue for streaming sources
Streaming sources were directly assigned their InputFormat in the
StreamingJobGraphGenerator. As a consequence, the input formats were directly
serialized/deserialized by Akka when the JobGraph was sent to the JobManager.
In cases where the user provided a custom input format or an input format with
custom types, this could lead to a ClassDefNotFoundException, because the
system class loader instead of the user code class loader is used by Akka for
the deserialization.
The problem was fixed by wrapping the InputFormat into a
UserCodeObjectWrapper which is shipped ot the JobManager via the JobVertex's
configuration. By instantiating stream sources as InputFormatVertices, the
corresponding InputFormat is retrieved from the Configuration in the
initializeOnMaster method call.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/tillrohrmann/flink fixInputFormatClassloading
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/1368.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #1368
commit d841654e392d5114cd2ce62bc47fb68ed8198a52
Author: Till Rohrmann
Date: 2015-11-17T13:23:31Z
[FLINK-3021] Fix class loading issue for streaming sources
Streaming sources were directly assigned their InputFormat in the
StreamingJobGraphGenerator. As a consequence, the input formats were directly
serialized/deserialized by Akka when the JobGraph was sent to the JobManager.
In cases where the user provided a custom input format or an input format with
custom types, this could lead to a ClassDefNotFoundException, because the
system class loader instead of the user code class loader is used by Akka for
the deserialization.
The problem was fixed by wrapping the InputFormat into a
UserCodeObjectWrapper which is shipped ot the JobManager via the JobVertex's
configuration. By instantiating stream sources as InputFormatVertices, the
corresponding InputFormat is retrieved from the Configuration in the
initializeOnMaster method call.
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