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Posted to commits@cassandra.apache.org by "Jon Meredith (JIRA)" <ji...@apache.org> on 2019/05/08 16:12:00 UTC
[jira] [Commented] (CASSANDRA-15117)
CommitLogArchiver.maybeRestoreArchive() throws a RuntimeException when it
failed to list a directory
[ https://issues.apache.org/jira/browse/CASSANDRA-15117?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16835718#comment-16835718 ]
Jon Meredith commented on CASSANDRA-15117:
------------------------------------------
Thanks for filing the bug report. I'll be investigating over the next few days.
> CommitLogArchiver.maybeRestoreArchive() throws a RuntimeException when it failed to list a directory
> ----------------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-15117
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15117
> Project: Cassandra
> Issue Type: Bug
> Reporter: eBugs
> Assignee: Jon Meredith
> Priority: Normal
>
> Dear Cassandra developers, we are developing a tool to detect exception-related bugs in Java. Our prototype has spotted the following {{throw}} statement whose exception class and error message indicate different error conditions.
>
> Version: Cassandra-3.11 (commit: 123113f7b887370a248669ee0db6fdf13df0146e)
> File: CASSANDRA-ROOT/src/java/org/apache/cassandra/db/commitlog/CommitLogArchiver.java
> Line: 225
> {code:java}
> throw new RuntimeException("Unable to list directory " + dir);{code}
>
> {{RuntimeException}} is usually used to represent errors in the program logic (think of one of its subclasses, {{NullPointerException}}), while the error message indicates that {{maybeRestoreArchive()}} failed to list a directory. This mismatch could be a problem. For example, the callers may miss the possibility that {{maybeRestoreArchive()}} can fail to list a directory because it does not throw any {{IOException}}. Or, the callers trying to handle other {{RuntimeException}} may accidentally (and incorrectly) handle the directory listing failure.
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