[jira] [Updated] (HDFS-7392) org.apache.hadoop.hdfs.DistributedFileSystem open invalid URI forever

["Yi Liu (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDFS-7392?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yi Liu updated HDFS-7392:
-------------------------
    Assignee: Daniel Pesch  (was: Yi Liu)

> org.apache.hadoop.hdfs.DistributedFileSystem open invalid URI forever
> ---------------------------------------------------------------------
>
>                 Key: HDFS-7392
>                 URL: https://issues.apache.org/jira/browse/HDFS-7392
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs-client
>            Reporter: Frantisek Vacek
>            Assignee: Daniel Pesch
>         Attachments: 1.png, 2.png, HDFS-7392.diff
>
>
> In some specific circumstances, org.apache.hadoop.hdfs.DistributedFileSystem.open(invalid URI) never timeouts and last forever.
> What are specific circumstances:
> 1) HDFS URI (hdfs://share.example.com:8020/someDir/someFile.txt) should point to valid IP address but without name node service running on it.
> 2) There should be at least 2 IP addresses for such a URI. See output below:
> {quote}
> [~/proj/quickbox]$ nslookup share.example.com
> Server:         127.0.1.1
> Address:        127.0.1.1#53
> share.example.com canonical name = internal-realm-share-example-com-1234.us-east-1.elb.amazonaws.com.
> Name:   internal-realm-share-example-com-1234.us-east-1.elb.amazonaws.com
> Address: 192.168.1.223
> Name:   internal-realm-share-example-com-1234.us-east-1.elb.amazonaws.com
> Address: 192.168.1.65
> {quote}
> In such a case the org.apache.hadoop.ipc.Client.Connection.updateAddress() returns sometimes true (even if address didn't actually changed see img. 1) and the timeoutFailures counter is set to 0 (see img. 2). The maxRetriesOnSocketTimeouts (45) is never reached and connection attempt is repeated forever.



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