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https://issues.apache.org/jira/browse/HBASE-5848?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13260040#comment-13260040
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Lars Hofhansl commented on HBASE-5848:
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The client already checks for duplicate keys in splitKeys, we could just check
for the empty key as well (no sense passing the empty key to createTable
anyway), and throw an error as well.
Obviously that does not guard against rogue clients and it would be extremely
simple to DOS an HBase cluster.
> Create table with EMPTY_START_ROW passed as splitKey causes the HMaster to
> abort
> --------------------------------------------------------------------------------
>
> Key: HBASE-5848
> URL: https://issues.apache.org/jira/browse/HBASE-5848
> Project: HBase
> Issue Type: Bug
> Components: client
> Reporter: Lars Hofhansl
> Assignee: Lars Hofhansl
> Priority: Minor
> Attachments: HBASE-5848.patch
>
>
> A coworker of mine just had this scenario. It does not make sense the
> EMPTY_START_ROW as splitKey (since the region with the empty start key is
> implicit), but it should not cause the HMaster to abort.
> The abort happens because it tries to bulk assign the same region twice and
> then runs into race conditions with ZK.
> The same would (presumably) happen when two identical split keys are passed,
> but the client blocks that. The simplest solution here is to also block
> passed null or EMPTY_START_ROW as split key by the client.
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