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Posted to common-issues@hadoop.apache.org by "xia0c (JIRA)" <ji...@apache.org> on 2019/08/16 22:15:00 UTC

[jira] [Created] (HADOOP-16518) Updating incompatible issue

xia0c created HADOOP-16518:
------------------------------

             Summary: Updating incompatible issue
                 Key: HADOOP-16518
                 URL: https://issues.apache.org/jira/browse/HADOOP-16518
             Project: Hadoop Common
          Issue Type: Bug
          Components: io
    Affects Versions: 3.1.2, 2.8.5
            Reporter: xia0c


Hi,

The following code snippets throw an incompatible issue when I try to rolling update Hadoop Common from 2.7.7 to 3.X. The Hadoop-hdfs version is 2.7.1.


{code:java}
@Test
public void Test(){
	RetryPolicy retryPolicy =
            RetryUtils.getDefaultRetryPolicy(
            		conf,
                    DFSConfigKeys.DFS_HTTP_CLIENT_RETRY_POLICY_ENABLED_KEY,
                    DFSConfigKeys.DFS_HTTP_CLIENT_RETRY_POLICY_ENABLED_DEFAULT,
                    DFSConfigKeys.DFS_HTTP_CLIENT_RETRY_POLICY_SPEC_KEY,
                    DFSConfigKeys.DFS_HTTP_CLIENT_RETRY_POLICY_SPEC_DEFAULT,
                    SafeModeException.class);
}
{code}

It throws an error:  incompatible types: java.lang.Class<org.apache.hadoop.hdfs.server.namenode.SafeModeException> cannot be converted to java.lang.String

Thanks a lot.




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