Hi,
I’m using StreamingFileSink of 1.6.0 to write logs to S3 and encounter a
classloader problem. It seems that there are conflicts in
flink-shaded-hadoop2-uber-1.6.0.jar and flink-s3-fs-hadoop-1.6.0.jar, and maybe
related to class loading orders.
Did anyone meet this problem? Thanks a lot!
The stack traces are as below:
java.io.IOException: java.lang.RuntimeException: class
org.apache.hadoop.security.LdapGroupsMapping not
org.apache.flink.fs.s3hadoop.shaded.org.apache.hadoop.security.GroupMappingServiceProvider
at
org.apache.flink.fs.s3hadoop.shaded.org.apache.flink.runtime.fs.hdfs.AbstractFileSystemFactory.create(AbstractFileSystemFactory.java:62)
at
org.apache.flink.core.fs.FileSystem.getUnguardedFileSystem(FileSystem.java:395)
at org.apache.flink.core.fs.FileSystem.get(FileSystem.java:318)
at
org.apache.flink.streaming.api.functions.sink.filesystem.Buckets.<init>(Buckets.java:111)
at
org.apache.flink.streaming.api.functions.sink.filesystem.StreamingFileSink$RowFormatBuilder.createBuckets(StreamingFileSink.java:242)
at
org.apache.flink.streaming.api.functions.sink.filesystem.StreamingFileSink.initializeState(StreamingFileSink.java:327)
at
org.apache.flink.streaming.util.functions.StreamingFunctionUtils.tryRestoreFunction(StreamingFunctionUtils.java:178)
at
org.apache.flink.streaming.util.functions.StreamingFunctionUtils.restoreFunctionState(StreamingFunctionUtils.java:160)
at
org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.initializeState(AbstractUdfStreamOperator.java:96)
at
org.apache.flink.streaming.api.operators.AbstractStreamOperator.initializeState(AbstractStreamOperator.java:254)
at
org.apache.flink.streaming.runtime.tasks.StreamTask.initializeState(StreamTask.java:738)
at
org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:289)
at org.apache.flink.runtime.taskmanager.Task.run(Task.java:711)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.RuntimeException: java.lang.RuntimeException: class
org.apache.hadoop.security.LdapGroupsMapping not
org.apache.flink.fs.s3hadoop.shaded.org.apache.hadoop.security.GroupMappingServiceProvider
at
org.apache.flink.fs.s3hadoop.shaded.org.apache.hadoop.conf.Configuration.getClass(Configuration.java:2246)
at
org.apache.flink.fs.s3hadoop.shaded.org.apache.hadoop.security.Groups.<init>(Groups.java:108)
at
org.apache.flink.fs.s3hadoop.shaded.org.apache.hadoop.security.Groups.<init>(Groups.java:102)
at
org.apache.flink.fs.s3hadoop.shaded.org.apache.hadoop.security.Groups.getUserToGroupsMappingService(Groups.java:450)
at
org.apache.flink.fs.s3hadoop.shaded.org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:309)
at
org.apache.flink.fs.s3hadoop.shaded.org.apache.hadoop.security.UserGroupInformation.ensureInitialized(UserGroupInformation.java:276)
at
org.apache.flink.fs.s3hadoop.shaded.org.apache.hadoop.security.UserGroupInformation.loginUserFromSubject(UserGroupInformation.java:832)
at
org.apache.flink.fs.s3hadoop.shaded.org.apache.hadoop.security.UserGroupInformation.getLoginUser(UserGroupInformation.java:802)
at
org.apache.flink.fs.s3hadoop.shaded.org.apache.hadoop.security.UserGroupInformation.getCurrentUser(UserGroupInformation.java:675)
at
org.apache.flink.fs.s3hadoop.shaded.org.apache.hadoop.fs.s3a.S3AFileSystem.initialize(S3AFileSystem.java:177)
at
org.apache.flink.fs.s3hadoop.shaded.org.apache.flink.runtime.fs.hdfs.AbstractFileSystemFactory.create(AbstractFileSystemFactory.java:57)
... 13 more
Caused by: java.lang.RuntimeException: class
org.apache.hadoop.security.LdapGroupsMapping not
org.apache.flink.fs.s3hadoop.shaded.org.apache.hadoop.security.GroupMappingServiceProvider
at
org.apache.flink.fs.s3hadoop.shaded.org.apache.hadoop.conf.Configuration.getClass(Configuration.java:2240)
... 23 more
Best,
Paul Lam
