zuston commented on issue #612:
URL:
https://github.com/apache/incubator-uniffle/issues/612#issuecomment-1444897770
Detailed info:
```
2023-02-16 06:57:00,663 INFO [main] buffer.ShuffleBufferManager
(ShuffleBufferManager.java:pickFlushedShuffle(500)) - Finish flush pick with 67
bytes
SLF4J: Failed toString() invocation on an object of type
[org.apache.uniffle.server.ShuffleDataFlushEvent]
Reported exception:
java.lang.NullPointerException
at
org.apache.uniffle.server.ShuffleDataFlushEvent.toString(ShuffleDataFlushEvent.java:163)
at
org.slf4j.helpers.MessageFormatter.safeObjectAppend(MessageFormatter.java:277)
at
org.slf4j.helpers.MessageFormatter.deeplyAppendParameter(MessageFormatter.java:249)
at
org.slf4j.helpers.MessageFormatter.arrayFormat(MessageFormatter.java:211)
at
org.slf4j.helpers.MessageFormatter.arrayFormat(MessageFormatter.java:161)
at org.slf4j.helpers.MessageFormatter.format(MessageFormatter.java:124)
at org.slf4j.impl.Log4jLoggerAdapter.error(Log4jLoggerAdapter.java:516)
at
org.apache.uniffle.server.ShuffleFlushManager.flushToFile(ShuffleFlushManager.java:186)
at
org.apache.uniffle.server.ShuffleFlushManager.processEvent(ShuffleFlushManager.java:157)
at
org.apache.uniffle.server.ShuffleFlushManager.lambda$processNextEvent$0(ShuffleFlushManager.java:148)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:750)
```
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