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https://issues.apache.org/jira/browse/HDFS-7392?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14251741#comment-14251741
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Frantisek Vacek commented on HDFS-7392:
---------------------------------------
I'm also attaching a log whent the patch is applied.
{code}
DEBUG [main] (Client.java:697) - Connecting to share.merck.com/54.40.29.65:8020
INFO [main] (Client.java:816) - Retrying connect to server:
share.merck.com/54.40.29.65:8020. Already tried 1 time(s); maxRetries=45
WARN [main] (Client.java:564) - Address change detected. Old:
share.merck.com/54.40.29.65:8020 New: share.merck.com/54.40.29.223:8020
INFO [main] (Client.java:816) - Retrying connect to server:
share.merck.com/54.40.29.223:8020. Already tried 2 time(s); maxRetries=45
INFO [main] (Client.java:816) - Retrying connect to server:
share.merck.com/54.40.29.223:8020. Already tried 1 time(s); maxRetries=45
WARN [main] (Client.java:564) - Address change detected. Old:
share.merck.com/54.40.29.223:8020 New: share.merck.com/54.40.29.65:8020
INFO [main] (Client.java:816) - Retrying connect to server:
share.merck.com/54.40.29.65:8020. Already tried 2 time(s); maxRetries=45
INFO [main] (Client.java:816) - Retrying connect to server:
share.merck.com/54.40.29.65:8020. Already tried 3 time(s); maxRetries=45
WARN [main] (Client.java:564) - Address change detected. Old:
share.merck.com/54.40.29.65:8020 New: share.merck.com/54.40.29.223:8020
INFO [main] (Client.java:816) - Retrying connect to server:
share.merck.com/54.40.29.223:8020. Already tried 4 time(s); maxRetries=45
INFO [main] (Client.java:816) - Retrying connect to server:
share.merck.com/54.40.29.223:8020. Already tried 3 time(s); maxRetries=45
INFO [main] (Client.java:816) - Retrying connect to server:
share.merck.com/54.40.29.223:8020. Already tried 4 time(s); maxRetries=45
INFO [main] (Client.java:816) - Retrying connect to server:
share.merck.com/54.40.29.223:8020. Already tried 5 time(s); maxRetries=45
INFO [main] (Client.java:816) - Retrying connect to server:
share.merck.com/54.40.29.223:8020. Already tried 6 time(s); maxRetries=45
INFO [main] (Client.java:816) - Retrying connect to server:
share.merck.com/54.40.29.223:8020. Already tried 7 time(s); maxRetries=45
WARN [main] (Client.java:564) - Address change detected. Old:
share.merck.com/54.40.29.223:8020 New: share.merck.com/54.40.29.65:8020
INFO [main] (Client.java:816) - Retrying connect to server:
share.merck.com/54.40.29.65:8020. Already tried 8 time(s); maxRetries=45
INFO [main] (Client.java:816) - Retrying connect to server:
share.merck.com/54.40.29.65:8020. Already tried 5 time(s); maxRetries=45
INFO [main] (Client.java:816) - Retrying connect to server:
share.merck.com/54.40.29.65:8020. Already tried 6 time(s); maxRetries=45
INFO [main] (Client.java:816) - Retrying connect to server:
share.merck.com/54.40.29.65:8020. Already tried 7 time(s); maxRetries=45
WARN [main] (Client.java:564) - Address change detected. Old:
share.merck.com/54.40.29.65:8020 New: share.merck.com/54.40.29.223:8020
INFO [main] (Client.java:816) - Retrying connect to server:
share.merck.com/54.40.29.223:8020. Already tried 8 time(s); maxRetries=45
INFO [main] (Client.java:816) - Retrying connect to server:
share.merck.com/54.40.29.223:8020. Already tried 9 time(s); maxRetries=45
{code}
> 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: Yi Liu
> 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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