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https://issues.apache.org/jira/browse/HDFS-3134?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13266728#comment-13266728
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Colin Patrick McCabe commented on HDFS-3134:
--------------------------------------------
I looked at
https://builds.apache.org/job/PreCommit-HDFS-Build/2359//artifact/trunk/patchprocess/newPatchFindbugsWarningshadoop-hdfs.html
and it contains this:
bq. org.apache.hadoop.hdfs.server.namenode.INodeFileUnderConstruction doesn't
override INodeFile.equals(Object)
Since this patch doesn't change INodeFileUnderConstruction at all, I can only
assume that this is a known problem where someone introduced a findbugs bug
without introducing a suppression.
So this patch should be ready to submit...
> harden edit log loader against malformed or malicious input
> -----------------------------------------------------------
>
> Key: HDFS-3134
> URL: https://issues.apache.org/jira/browse/HDFS-3134
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: name-node
> Affects Versions: 0.23.0
> Reporter: Colin Patrick McCabe
> Assignee: Colin Patrick McCabe
> Attachments: HDFS-3134.001.patch, HDFS-3134.002.patch,
> HDFS-3134.003.patch, HDFS-3134.004.patch, HDFS-3134.005.patch,
> HDFS-3134.006.patch, HDFS-3134.007.patch
>
>
> Currently, the edit log loader does not handle bad or malicious input
> sensibly.
> We can often cause OutOfMemory exceptions, null pointer exceptions, or other
> unchecked exceptions to be thrown by feeding the edit log loader bad input.
> In some environments, an out of memory error can cause the JVM process to be
> terminated.
> It's clear that we want these exceptions to be thrown as IOException instead
> of as unchecked exceptions. We also want to avoid out of memory situations.
> The main task here is to put a sensible upper limit on the lengths of arrays
> and strings we allocate on command. The other task is to try to avoid
> creating unchecked exceptions (by dereferencing potentially-NULL pointers,
> for example). Instead, we should verify ahead of time and give a more
> sensible error message that reflects the problem with the input.
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