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https://issues.apache.org/jira/browse/SPARK-30599?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Maxim Gekk updated SPARK-30599:
-------------------------------
    Attachment: fail_trace.txt

> SparkFunSuite.LogAppender throws java.lang.IllegalStateException
> ----------------------------------------------------------------
>
>                 Key: SPARK-30599
>                 URL: https://issues.apache.org/jira/browse/SPARK-30599
>             Project: Spark
>          Issue Type: Test
>          Components: Spark Core, SQL, Tests
>    Affects Versions: 3.0.0
>            Reporter: Maxim Gekk
>            Priority: Minor
>         Attachments: fail_trace.txt, success_trace.txt
>
>
> The LogAppender has a limit for the number of logged event. By default, it is 
> 100. All tests that use LogAppender finish successfully with this limit but 
> sometime the test fail with the exception like:
> {code:java}
> java.lang.IllegalStateException: Number of events reached the limit of 100 
> while logging CSV header matches to schema w/ enforceSchema.
>       at 
> org.apache.spark.SparkFunSuite$LogAppender.append(SparkFunSuite.scala:200)
>       at org.apache.log4j.AppenderSkeleton.doAppend(AppenderSkeleton.java:251)
>       at 
> org.apache.log4j.helpers.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:66)
>       at org.apache.log4j.Category.callAppenders(Category.java:206)
>       at org.apache.log4j.Category.forcedLog(Category.java:391)
>       at org.apache.log4j.Category.log(Category.java:856) 
> {code}
> For example, the CSV test "SPARK-23786: warning should be printed if CSV 
> header doesn't conform to schema" uses 2 log appenders.



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