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https://issues.apache.org/jira/browse/HDFS-3134?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13240181#comment-13240181
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Suresh Srinivas commented on HDFS-3134:
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bq. 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.
>From which methods?
Unchecked exceptions indicate programming errors. Blindly turning them into
checked exceptions is not a good idea (as you say so in some of your comments).
I am not sure which part of the code you are talking about.
> 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
> Reporter: Colin Patrick McCabe
> Assignee: Colin Patrick McCabe
>
> 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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