[BUG] Failed to init client for PD cluster with 240 clients

[marsishandsome]

Failed to init client for PD cluster with 240 clients

21/08/23 17:44:54 ERROR Executor: Exception in task 53.0 in stage 11.0 (TID 1740)
java.lang.NullPointerException: Failed to init client for PD cluster.
	at org.tikv.shade.com.google.common.base.Preconditions.checkNotNull(Preconditions.java:906)
	at org.tikv.common.PDClient.initCluster(PDClient.java:587)
	at org.tikv.common.PDClient.<init>(PDClient.java:116)
	at org.tikv.common.PDClient.createRaw(PDClient.java:126)
	at org.tikv.common.TiSession.<init>(TiSession.java:82)
	at org.tikv.common.TiSession.create(TiSession.java:93)
	at org.tikv.bulkload.RawKVBulkLoader.writeAndIngest(RawKVBulkLoader.scala:152)
	at org.tikv.bulkload.RawKVBulkLoader.$anonfun$bulkLoad$5(RawKVBulkLoader.scala:112)
	at org.tikv.bulkload.RawKVBulkLoader.$anonfun$bulkLoad$5$adapted(RawKVBulkLoader.scala:111)
	at org.apache.spark.rdd.RDD.$anonfun$foreachPartition$2(RDD.scala:994)
	at org.apache.spark.rdd.RDD.$anonfun$foreachPartition$2$adapted(RDD.scala:994)
	at org.apache.spark.SparkContext.$anonfun$runJob$5(SparkContext.scala:2154)
	at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:90)
	at org.apache.spark.scheduler.Task.run(Task.scala:127)
	at org.apache.spark.executor.Executor$TaskRunner.$anonfun$run$3(Executor.scala:463)
	at org.apache.spark.util.Utils$.tryWithSafeFinally(Utils.scala:1377)
	at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:466)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)