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https://issues.apache.org/jira/browse/HDFS-14467?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Ayush Saxena resolved HDFS-14467.
---------------------------------
Resolution: Duplicate
> DatasetVolumeChecker() throws A DiskErrorException when the configuration has
> wrong values
> ------------------------------------------------------------------------------------------
>
> Key: HDFS-14467
> URL: https://issues.apache.org/jira/browse/HDFS-14467
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Affects Versions: 3.1.2
> Reporter: eBugs
> Priority: Minor
>
> Dear HDFS developers, we are developing a tool to detect exception-related
> bugs in Java. Our prototype has spotted the following four {{throw}}
> statements whose exception class and error message indicate different error
> conditions.
>
> Version: Hadoop-3.1.2
> File:
> HADOOP-ROOT/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/checker/DatasetVolumeChecker.java
> Line: 122-124, 139-141, 150-152, and 158-161
> {code:java}
> throw new DiskErrorException("Invalid value configured for "
> + DFS_DATANODE_DISK_CHECK_TIMEOUT_KEY + " - "
> + maxAllowedTimeForCheckMs + " (should be > 0)");{code}
> {code:java}
> throw new DiskErrorException("Invalid value configured for "
> + DFS_DATANODE_DISK_CHECK_MIN_GAP_KEY + " - "
> + minDiskCheckGapMs + " (should be >= 0)");{code}
> {code:java}
> throw new DiskErrorException("Invalid value configured for "
> + DFS_DATANODE_DISK_CHECK_TIMEOUT_KEY + " - "
> + diskCheckTimeout + " (should be >= 0)");{code}
> {code:java}
> throw new DiskErrorException("Invalid value configured for "
> + DFS_DATANODE_FAILED_VOLUMES_TOLERATED_KEY + " - "
> + maxVolumeFailuresTolerated + " "
> + DataNode.MAX_VOLUME_FAILURES_TOLERATED_MSG);{code}
>
> A {{DiskErrorException}} means an error has occurred when the process is
> interacting with the disk, e.g., in
> {{org.apache.hadoop.util.DiskChecker.checkDirInternal()}} we have the
> following code (lines 97-98):
> {code:java}
> throw new DiskErrorException("Cannot create directory: " +
> dir.toString());{code}
> However, the error messages of the first four exceptions indicate that the
> {{DatasetVolumeChecker}} is configured incorrectly, which means there is
> nothing wrong with the disk (yet). This mismatch could be a problem. For
> example, the callers trying to handle other {{DiskErrorException}} may
> accidentally (and incorrectly) handle the configuration error.
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