Hi Maulik,
I believe you may be witnessing this issue:
https://issues.apache.org/jira/browse/BEAM-8303. We ran into this using
beam-2.15.0 on flink-1.8 over S3. It looks like it’ll be fixed in 2.17.0.
As a temporary workaround, you can set the #withNoSpilling() option if you’re
using the FileIO api. If not, it should be relatively easy to move to it.
From: Maulik Soneji <maulik.son...@gojek.com>
Reply-To: "dev@beam.apache.org" <dev@beam.apache.org>
Date: Thursday, October 24, 2019 at 7:05 AM
To: "dev@beam.apache.org" <dev@beam.apache.org>
Subject: Intermittent No FileSystem found exception
Hi everyone,
We are running a Batch job on flink that reads data from GCS and does some
aggregation on this data.
We are intermittently getting issue: `No filesystem found for scheme gs`
We are running Beam version 2.15.0 with FlinkRunner, Flink version: 1.6.4
On remote debugging the task managers, we found that in a few task managers,
the GcsFileSystemRegistrar is not added to the list of FileSystem Schemes. In
these task managers, we get this issue.
The collection SCHEME_TO_FILESYSTEM is getting modified only in
setDefaultPipelineOptions function call in org.apache.beam.sdk.io.FileSystems
class and this function is not getting called and thus the
GcsFileSystemRegistrar is not added to SCHEME_TO_FILESYSTEM.
Detailed stacktrace:
java.lang.IllegalArgumentException: No filesystem found for scheme gs
at
org.apache.beam.sdk.io.FileSystems.getFileSystemInternal(FileSystems.java:463)
at
org.apache.beam.sdk.io.FileSystems.matchNewResource(FileSystems.java:533)
at
org.apache.beam.sdk.io.fs.ResourceIdCoder.decode(ResourceIdCoder.java:49)
at
org.apache.beam.sdk.io.fs.MetadataCoder.decodeBuilder(MetadataCoder.java:62)
at
org.apache.beam.sdk.io.fs.MetadataCoder.decode(MetadataCoder.java:58)
at
org.apache.beam.sdk.io.fs.MetadataCoder.decode(MetadataCoder.java:36)
at org.apache.beam.sdk.coders.Coder.decode(Coder.java:159)
at org.apache.beam.sdk.coders.KvCoder.decode(KvCoder.java:82)
at org.apache.beam.sdk.coders.KvCoder.decode(KvCoder.java:36)
at
org.apache.beam.sdk.util.WindowedValue$FullWindowedValueCoder.decode(WindowedValue.java:592)
at
org.apache.beam.sdk.util.WindowedValue$FullWindowedValueCoder.decode(WindowedValue.java:583)
at
org.apache.beam.sdk.util.WindowedValue$FullWindowedValueCoder.decode(WindowedValue.java:529)
at
org.apache.beam.runners.flink.translation.types.CoderTypeSerializer.deserialize(CoderTypeSerializer.java:92)
at
org.apache.flink.runtime.plugable.NonReusingDeserializationDelegate.read(NonReusingDeserializationDelegate.java:55)
at
org.apache.flink.runtime.io.network.api.serialization.SpillingAdaptiveSpanningRecordDeserializer.getNextRecord(SpillingAdaptiveSpanningRecordDeserializer.java:106)
at
org.apache.flink.runtime.io.network.api.reader.AbstractRecordReader.getNextRecord(AbstractRecordReader.java:72)
at
org.apache.flink.runtime.io.network.api.reader.MutableRecordReader.next(MutableRecordReader.java:47)
at
org.apache.flink.runtime.operators.util.ReaderIterator.next(ReaderIterator.java:73)
at
org.apache.flink.runtime.operators.NoOpDriver.run(NoOpDriver.java:94)
at org.apache.flink.runtime.operators.BatchTask.run(BatchTask.java:503)
at
org.apache.flink.runtime.operators.BatchTask.invoke(BatchTask.java:368)
at org.apache.flink.runtime.taskmanager.Task.run(Task.java:711)
at java.lang.Thread.run(Thread.java:748)
Inorder to resolve this issue, we tried calling the following in PTransform's
expand function:
FileSystems.setDefaultPipelineOptions(PipelineOptionsFactory.create());
This function call is to make sure that the GcsFileSystemRegistrar is added to
the list, but this hasn't solved the issue.
Can someone please help in checking why this might be happening and what can be
done to resolve this issue.
Thanks and Regards,
Maulik
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