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https://issues.apache.org/jira/browse/SPARK-59747?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated SPARK-59747:
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Labels: pull-request-available (was: )
> History Server repeatedly retries compaction of rolled event log files that
> contain malformed input
> ---------------------------------------------------------------------------------------------------
>
> Key: SPARK-59747
> URL: https://issues.apache.org/jira/browse/SPARK-59747
> Project: Spark
> Issue Type: Bug
> Components: Web UI
> Affects Versions: 4.1.0, 4.0.1, 4.2.0
> Reporter: Yiping Deng
> Priority: Minor
> Labels: pull-request-available
>
> When the rolled event log files that are eligible for compaction contain
> bytes that are not valid UTF-8, EventLogFileCompactor fails with
> java.nio.charset.MalformedInputException (a CharacterCodingException) while
> replaying them to initialize the event filter builders.
> FsHistoryProvider.compact() only records lastEvaluatedForCompaction after
> compaction succeeds, and the exception reaches the generic handler, which
> logs it at ERROR:
> {code:java}
> ERROR FsHistoryProvider: Exception while compacting log for
> file:/.../eventlog_v2_app
> java.nio.charset.MalformedInputException: Input length = 1{code}
> The listing replay stops early, so it never reaches the malformed bytes and
> the application keeps being listed. Each time the last (non-compacted) event
> log file grows, the log is reprocessed and compaction of the same unchanged
> rolled files is tried again. For a long-running application this logs a full
> stack trace at ERROR on every scan until a new event log file is rolled.
> Rolled files are no longer modified, so the retry can never succeed.
> Proposed fix: when compaction fails with CharacterCodingException, log a WARN
> and still record the index as evaluated, so compaction of the same files is
> not retried until a new event log file is rolled.
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