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Posted to common-issues@hadoop.apache.org by "Keith Turner (JIRA)" <ji...@apache.org> on 2019/01/28 22:06:00 UTC

[jira] [Created] (HADOOP-16080) hadoop-aws does not work with hadoop-client-api

Keith Turner created HADOOP-16080:
-------------------------------------

             Summary: hadoop-aws does not work with hadoop-client-api
                 Key: HADOOP-16080
                 URL: https://issues.apache.org/jira/browse/HADOOP-16080
             Project: Hadoop Common
          Issue Type: Improvement
          Components: fs/s3
    Affects Versions: 3.1.1
            Reporter: Keith Turner


I attempted to use Accumulo and S3a with the following jars on the classpath.

 * hadoop-client-api-3.1.1.jar
 * hadoop-client-runtime-3.1.1.jar
 * hadoop-aws-3.1.1.jar

This failed with the following exception.

{noformat}
Exception in thread "init" java.lang.NoSuchMethodError: org.apache.hadoop.util.SemaphoredDelegatingExecutor.<init>(Lcom/google/common/util/concurrent/ListeningExecutorService;IZ)V
    at org.apache.hadoop.fs.s3a.S3AFileSystem.create(S3AFileSystem.java:769)
    at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:1169)
    at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:1149)
    at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:1108)
    at org.apache.hadoop.fs.FileSystem.createNewFile(FileSystem.java:1413)
    at org.apache.accumulo.server.fs.VolumeManagerImpl.createNewFile(VolumeManagerImpl.java:184)
    at org.apache.accumulo.server.init.Initialize.initDirs(Initialize.java:479)
    at org.apache.accumulo.server.init.Initialize.initFileSystem(Initialize.java:487)
    at org.apache.accumulo.server.init.Initialize.initialize(Initialize.java:370)
    at org.apache.accumulo.server.init.Initialize.doInit(Initialize.java:348)
    at org.apache.accumulo.server.init.Initialize.execute(Initialize.java:967)
    at org.apache.accumulo.start.Main.lambda$execKeyword$0(Main.java:129)
    at java.lang.Thread.run(Thread.java:748)
{noformat}

The problem is that {{S3AFileSystem.create()}} looks for {{SemaphoredDelegatingExecutor(com.google.common.util.concurrent.ListeningExecutorService)}} which does not exist in hadoop-client-api-3.1.1.jar.  What does exist is {{SemaphoredDelegatingExecutor(org.apache.hadoop.shaded.com.google.common.util.concurrent.ListeningExecutorService)}}.

To work around this issue I created a version of hadoop-aws-3.1.1.jar that relocated references to Guava.




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