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https://issues.apache.org/jira/browse/HBASE-1951?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12773326#action_12773326
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stack commented on HBASE-1951:
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Looks good +1. I like the test. You going to fix HBASE-1781 too?
> Stack overflow when calling HTable.checkAndPut() when deleting a lot of values
> ------------------------------------------------------------------------------
>
> Key: HBASE-1951
> URL: https://issues.apache.org/jira/browse/HBASE-1951
> Project: Hadoop HBase
> Issue Type: Bug
> Components: regionserver
> Affects Versions: 0.20.1
> Environment: Running HBase 0.20.1 on Cloudera distribution of Hadoop
> 0.20.1+152 on an EC2 test cluster with one master, one embedded zookeeper,
> and only one region server
> Reporter: Age Mooij
> Fix For: 0.20.2, 0.21.0
>
> Attachments: HBASE-1951-v2.patch, HBASE-1951.patch, stacktrace.txt
>
>
> We get a stackoverflow when calling HTable.checkAndPut() from a map-reduce
> job though the client API after doing a large number of deletes.
> Our mapred job is a periodic job (which extends TableMapper) that merges the
> versions for a value in a column into a new value/version and then deletes
> the older versions. This is because we use versions to store data so we can
> do append-only insertion. Our rows can have large/huge (from 1 till > 1M)
> numbers of columns (aka key-values).
> The problem seems to be that the
> org.apache.hadoop.hbase.regionserver.GetDeleteTracker.isDeleted() method is
> implemented with recursion but since Java has no tail recursion optimization,
> this fails for cases where the number of deletes that are being tracked is
> bigger than the stack size. I'm not sure why recursion is used here but it is
> not safe without tail-call optimization and it should be optimized into a
> simple loop.
> I'll attach the stacktrace.
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