hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Mingliang Liu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-11094) Send back HAState along with NamespaceInfo during a versionRequest as an optional parameter
Date Thu, 17 Nov 2016 23:59:01 GMT

    [ https://issues.apache.org/jira/browse/HDFS-11094?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15675208#comment-15675208
] 

Mingliang Liu commented on HDFS-11094:
--------------------------------------

+1

Some comments:

# Is it possible to add a unit test for the HAState is sent during a versionRequest RPC?
# Add some logging will be very helpful, e.g. {{LOG.info("Acknowledging ACTIVE Namenode during
handshake" + actor);}}
{code}
313	    if(nsInfo.getState() == HAServiceState.ACTIVE && bpServiceToActive == null)
{
314	      bpServiceToActive = actor;
315	    }
{code}
# The checkstyle warnings are related. Let's address them.


[~daryn] and [~arpitagarwal] If you don't have any comments, I'll commit this after the above
are addressed.

> Send back HAState along with NamespaceInfo during a versionRequest as an optional parameter
> -------------------------------------------------------------------------------------------
>
>                 Key: HDFS-11094
>                 URL: https://issues.apache.org/jira/browse/HDFS-11094
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Eric Badger
>            Assignee: Eric Badger
>         Attachments: HDFS-11094.001.patch, HDFS-11094.002.patch, HDFS-11094.003.patch,
HDFS-11094.004.patch, HDFS-11094.005.patch, HDFS-11094.006.patch
>
>
> The datanode should know which NN is active when it is connecting/registering to the
NN. Currently, it only figures this out during its first (and subsequent) heartbeat(s) and
so there is a period of time where the datanode is alive and registered, but can't actually
do anything because it doesn't know which NN is active. A byproduct of this is that the MiniDFSCluster
will become active before it knows what NN is active, which can lead to NPEs when calling
getActiveNN(). 



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

---------------------------------------------------------------------
To unsubscribe, e-mail: hdfs-issues-unsubscribe@hadoop.apache.org
For additional commands, e-mail: hdfs-issues-help@hadoop.apache.org


Mime
View raw message