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https://issues.apache.org/jira/browse/HADOOP-19836?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jim Halfpenny resolved HADOOP-19836.
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Resolution: Invalid
This issue belong in Hadoop HDFS and not Hadoop Common, I'll close this issue
and have created HDFS-17891 in the correct project.
> Running dfsadmin report fails when datanode name fails to resolve
> -----------------------------------------------------------------
>
> Key: HADOOP-19836
> URL: https://issues.apache.org/jira/browse/HADOOP-19836
> Project: Hadoop Common
> Issue Type: Bug
> Components: hdfs
> Affects Versions: 3.4.3
> Reporter: Jim Halfpenny
> Priority: Major
>
> When running `hdfs dfsadmin -report` on a cluster where one of the DataNode
> addresses cannot be resolved, the DataNode report fails with an
> IllegalArgumentException:
> {{stackable@simple-hdfs-namenode-default-0 /stackable/hadoop-3.4.0 $ hdfs
> dfsadmin -report}}
> {{Configured Capacity: 2933688373248 (2.67 TB)}}
> {{Present Capacity: 1299099013120 (1.18 TB)}}
> {{DFS Remaining: 1299098914816 (1.18 TB)}}
> {{DFS Used: 98304 (96 KB)}}
> {{DFS Used%: 0.00%}}
> {{Replicated Blocks:}}
> {{ Under replicated blocks: 0}}
> {{ Blocks with corrupt replicas: 0}}
> {{ Missing blocks: 0}}
> {{ Missing blocks (with replication factor 1): 0}}
> {{ Low redundancy blocks with highest priority to recover: 0}}
> {{ Pending deletion blocks: 0}}
> {{Erasure Coded Block Groups:}}
> {{ Low redundancy block groups: 0}}
> {{ Block groups with corrupt internal blocks: 0}}
> {{ Missing block groups: 0}}
> {{ Low redundancy blocks with highest priority to recover: 0}}
> {{ Pending deletion blocks: 0}}
> {{-------------------------------------------------}}
> {{report: java.lang.IllegalArgumentException}}
> The method that adds DataNode addressed to the list of nodes to report on
> checks to see if the hostname resolves. If this test fails then
> Preconditions.checkArgument() throws an uncaught IllegalArgumentException.
> {{ void add(InetSocketAddress addr) {}}
> {{ Preconditions.checkArgument(!addr.isUnresolved());}}
> {{ addrs.put(addr.getAddress(), addr.getPort());}}
> It would make more sense log the failure and return from the add() method
> rather than cause the creation of the HostSet to fail entirely.
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