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https://issues.apache.org/jira/browse/GIRAPH-904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15018368#comment-15018368
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Jaeho Shin commented on GIRAPH-904:
-----------------------------------
[~VishalDonderia] You are welcome to take a deeper look into this.
Unfortunately I won't have free cycles for the next few weeks.
> Giraph can hang when hostnames include uppercase letters
> --------------------------------------------------------
>
> Key: GIRAPH-904
> URL: https://issues.apache.org/jira/browse/GIRAPH-904
> Project: Giraph
> Issue Type: Bug
> Components: bsp, conf and scripts, zookeeper
> Affects Versions: 1.1.0
> Reporter: Jaeho Shin
> Assignee: Jaeho Shin
> Fix For: 1.1.0
>
> Attachments: GIRAPH-904.BspServiceMaster-fix.patch,
> GIRAPH-904.getHostname-fix.patch, GIRAPH-904.patch
>
>
> We found that Giraph jobs were consistently hanging if uppercase letters were
> included in the DNS (or /etc/hosts) resolved hostnames ({{foo.stanford.edu}}
> vs. {{foo.Stanford.EDU}} from our DNS). Normalizing the hostnames to lower
> case from {{GiraphConfiguration#getLocalHostname()}} fixed our problem.
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