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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SINGA-141) Undesired Hash collision when locating process id to workers and servers
Date Wed, 23 Mar 2016 12:13:25 GMT

    [ https://issues.apache.org/jira/browse/SINGA-141?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15208315#comment-15208315
] 

ASF subversion and git services commented on SINGA-141:
-------------------------------------------------------

Commit 259422c413933aa4b25f7f6efddf06aa31cb7c59 in incubator-singa's branch refs/heads/master
from [~flytosky]
[ https://git-wip-us.apache.org/repos/asf?p=incubator-singa.git;h=259422c ]

SINGA-141 Merge pull request fixing hash collision


> Undesired Hash collision when locating process id to workers and servers
> ------------------------------------------------------------------------
>
>                 Key: SINGA-141
>                 URL: https://issues.apache.org/jira/browse/SINGA-141
>             Project: Singa
>          Issue Type: Bug
>         Environment: universal
>            Reporter: Wang Ji
>
> Undesired Hash collision may happen when locating process id to workers and servers using
`int Cluster::Hash(int gid, int id, int flag)` in `cluster.cc`.
> For example, let us assume that there are 2 worker groups and 2 workers per group and
1 server in 1 server group, and we separate server and worker in different processes. Hash(1,0,0)
and Hash(0,0,2) will get the undesired same value 2.



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