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spark.shuffle.consolidateFiles是在使用HashShuffleManager的时候建议开启。spark2.x已经弃用了HashShuffleManager

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请问关于以下方面的内容在哪里能找到？

8.主要是数据倾斜，线上故障，性能调优，troubleshooting等经验的讲解。

Exception in thread "main" java.lang.NullPointerException
at cn.edu.hust.util.ParamUtils.getParam(ParamUtils.java:35)
at cn.edu.hust.session.UserVisitAnalyze.getActionRDD(UserVisitAnalyze.java:155)
at cn.edu.hust.session.UserVisitAnalyze.main(UserVisitAnalyze.java:58)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:730)
at org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:181)
at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:206)
at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:121)
at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)

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