Hi，
版本：Flink-1.15.1 有个场景，从hdfs读文件再处理数据，batch mode，10个并发，使用Flink SQL定义执行，source是connector=filesystem，format=raw，path=<HDFS文件路径> 执行任务的时候，有时候能成功，有时候失败了然后就一直失败，重启集群好像可以解决问题，这种情况如何是什么原因导致的？ 集群的off-heap都是默认配置， taskmanager.memory.task.off-heap.size=0 taskmanager.memory.framework.off-heap.size=128MB 报错堆栈： Caused by: java.lang.OutOfMemoryError: Direct buffer memory. The direct out-of-memory error has occurred. This can mean two things: either job(s) require(s) a larger size of JVM direct memory or there is a direct memory leak. The direct memory can be allocated by user code or some of its dependencies. In this case 'taskmanager.memory.task.off-heap.size' configuration option should be increased. Flink framework and its dependencies also consume the direct memory, mostly for network communication. The most of network memory is managed by Flink and should not result in out-of-memory error. In certain special cases, in particular for jobs with high parallelism, the framework may require more direct memory which is not managed by Flink. In this case 'taskmanager.memory.framework.off-heap.size' configuration option should be increased. If the error persists then there is probably a direct memory leak in user code or some of its dependencies which has to be investigated and fixed. The task executor has to be shutdown... at java.nio.Bits.reserveMemory(Bits.java:695) at java.nio.DirectByteBuffer.<init>(DirectByteBuffer.java:123) at java.nio.ByteBuffer.allocateDirect(ByteBuffer.java:311) at org.apache.hadoop.util.DirectBufferPool.getBuffer(DirectBufferPool.java:72) at org.apache.hadoop.hdfs.protocol.datatransfer.PacketReceiver.reallocPacketBuf(PacketReceiver.java:270) at org.apache.hadoop.hdfs.protocol.datatransfer.PacketReceiver.doRead(PacketReceiver.java:163) at org.apache.hadoop.hdfs.protocol.datatransfer.PacketReceiver.receiveNextPacket(PacketReceiver.java:102) at org.apache.hadoop.hdfs.client.impl.BlockReaderRemote.readNextPacket(BlockReaderRemote.java:183) at org.apache.hadoop.hdfs.client.impl.BlockReaderRemote.read(BlockReaderRemote.java:142) at org.apache.hadoop.hdfs.ByteArrayStrategy.readFromBlock(ReaderStrategy.java:118) at org.apache.hadoop.hdfs.DFSInputStream.readBuffer(DFSInputStream.java:704) at org.apache.hadoop.hdfs.DFSInputStream.readWithStrategy(DFSInputStream.java:765) at org.apache.hadoop.hdfs.DFSInputStream.read(DFSInputStream.java:825) at java.io.DataInputStream.read(DataInputStream.java:149) at org.apache.flink.runtime.fs.hdfs.HadoopDataInputStream.read(HadoopDataInputStream.java:96) at org.apache.flink.api.common.io.DelimitedInputFormat.fillBuffer(DelimitedInputFormat.java:742) at org.apache.flink.api.common.io.DelimitedInputFormat.readLine(DelimitedInputFormat.java:586) at org.apache.flink.api.common.io.DelimitedInputFormat.open(DelimitedInputFormat.java:505) at org.apache.flink.api.common.io.DelimitedInputFormat.open(DelimitedInputFormat.java:50) at org.apache.flink.streaming.api.functions.source.ContinuousFileReaderOperator.loadSplit(ContinuousFileReaderOperator.java:415) at org.apache.flink.streaming.api.functions.source.ContinuousFileReaderOperator.access$300(ContinuousFileReaderOperator.java:98) at org.apache.flink.streaming.api.functions.source.ContinuousFileReaderOperator$ReaderState$2.prepareToProcessRecord(ContinuousFileReaderOperator.java:122) at org.apache.flink.streaming.api.functions.source.ContinuousFileReaderOperator.processRecord(ContinuousFileReaderOperator.java:348) at org.apache.flink.streaming.api.functions.source.ContinuousFileReaderOperator.lambda$new$0(ContinuousFileReaderOperator.java:240) at org.apache.flink.streaming.runtime.tasks.StreamTaskActionExecutor$1.runThrowing(StreamTaskActionExecutor.java:50) at org.apache.flink.streaming.runtime.tasks.mailbox.Mail.run(Mail.java:90) at org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.processMailsNonBlocking(MailboxProcessor.java:353) at org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.processMail(MailboxProcessor.java:317) at org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxLoop(MailboxProcessor.java:201) at org.apache.flink.streaming.runtime.tasks.StreamTask.runMailboxLoop(StreamTask.java:804) at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:753) at org.apache.flink.runtime.taskmanager.Task.runWithSystemExitMonitoring(Task.java:948) at org.apache.flink.runtime.taskmanager.Task.restoreAndInvoke(Task.java:927) at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:741) at org.apache.flink.runtime.taskmanager.Task.run(Task.java:563) at java.lang.Thread.run(Thread.java:750) Thanks
