zuston opened a new issue, #808: URL: https://github.com/apache/incubator-uniffle/issues/808
### Code of Conduct - [X] I agree to follow this project's [Code of Conduct](https://www.apache.org/foundation/policies/conduct) ### Search before asking - [X] I have searched in the [issues](https://github.com/apache/incubator-uniffle/issues?q=is%3Aissue) and found no similar issues. ### Describe the bug This bug is caused by #706 . After this, the `buffers` in `WriterBuffer` will be visited by multi threads. Stacktrace: ``` 23/04/10 07:38:03 ERROR Executor: Exception in task 3025.0 in stage 0.0 (TID 676) java.lang.NullPointerException at org.apache.spark.shuffle.writer.WriterBuffer.getData(WriterBuffer.java:77) at org.apache.spark.shuffle.writer.WriteBufferManager.createShuffleBlock(WriteBufferManager.java:224) at org.apache.spark.shuffle.writer.WriteBufferManager.clear(WriteBufferManager.java:213) at org.apache.spark.shuffle.writer.WriteBufferManager.addRecord(WriteBufferManager.java:198) at org.apache.spark.shuffle.writer.RssShuffleWriter.doWrite(RssShuffleWriter.java:213) at org.apache.spark.shuffle.writer.RssShuffleWriter.write(RssShuffleWriter.java:167) at org.apache.spark.shuffle.ShuffleWriteProcessor.write(ShuffleWriteProcessor.scala:59) at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:99) at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:52) at org.apache.spark.scheduler.Task.run(Task.scala:131) at org.apache.spark.executor.Executor$TaskRunner.$anonfun$run$3(Executor.scala:497) at org.apache.spark.util.Utils$.tryWithSafeFinally(Utils.scala:1439) at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:500) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) ``` ### Affects Version(s) master ### Uniffle Server Log Output _No response_ ### Uniffle Engine Log Output _No response_ ### Uniffle Server Configurations _No response_ ### Uniffle Engine Configurations _No response_ ### Additional context _No response_ ### Are you willing to submit PR? - [X] Yes I am willing to submit a PR! -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
