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Posted to common-dev@hadoop.apache.org by "Gabor Bota (JIRA)" <ji...@apache.org> on 2018/09/27 17:24:00 UTC
[jira] [Created] (HADOOP-15796) ClassCastException: S3AFileSystem
cannot be cast to MockS3AFileSystem when fs caching is disabled
Gabor Bota created HADOOP-15796:
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Summary: ClassCastException: S3AFileSystem cannot be cast to MockS3AFileSystem when fs caching is disabled
Key: HADOOP-15796
URL: https://issues.apache.org/jira/browse/HADOOP-15796
Project: Hadoop Common
Issue Type: Bug
Components: fs/s3
Affects Versions: 3.1.1
Reporter: Gabor Bota
Sometimes we get {{java.io.IOException: s3a://TEST-BUCKET: FileSystem is closed!}} when running tests, because of filesystem caching: an fs instance is closed from a test teardown while another test is still using it. (That should be fixed in another issue.)
To avoid test errors introduced by closed fs I've disabled fs caching while testing. This caused the following issue in lots of test:
{noformat}
[ERROR] testPartitionsResolution(org.apache.hadoop.fs.s3a.commit.staging.TestStagingPartitionedFileListing) Time elapsed: 1.994 s <<< ERROR!
java.lang.ClassCastException: org.apache.hadoop.fs.s3a.S3AFileSystem cannot be cast to org.apache.hadoop.fs.s3a.MockS3AFileSystem
at org.apache.hadoop.fs.s3a.commit.staging.StagingTestBase.lookupWrapperFS(StagingTestBase.java:145)
at org.apache.hadoop.fs.s3a.commit.staging.StagingTestBase$JobCommitterTest.setupJob(StagingTestBase.java:294)
{noformat}
We should fix the casting during these tests
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