Hi, LocalBufferPool.requestMemorySegment 这个方法并不是在申请内存，而是因为作业存在反压，因为下游没有及时消费，相关buffer被占用，所以上游会卡在requestMemorySegment上面。
想要解决还是查一下为什么下游会反压。 祝好 唐云 ________________________________ From: Ada Luna <gfen...@gmail.com> Sent: Tuesday, July 6, 2021 10:43 To: user-zh@flink.apache.org <user-zh@flink.apache.org> Subject: Re: Flink 1.10 内存问题 "Source: test_records (2/3)" #78 prio=5 os_prio=0 tid=0x00007fd4c4a24800 nid=0x21bf in Object.wait() [0x00007fd4d581a000] java.lang.Thread.State: TIMED_WAITING (on object monitor) at java.lang.Object.wait(Native Method) at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestMemorySegment(LocalBufferPool.java:251) - locked <0x000000074d8b0df0> (a java.util.ArrayDeque) at org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBufferBuilderBlocking(LocalBufferPool.java:218) at org.apache.flink.runtime.io.network.api.writer.RecordWriter.requestNewBufferBuilder(RecordWriter.java:264) at org.apache.flink.runtime.io.network.api.writer.RecordWriter.copyFromSerializerToTargetChannel(RecordWriter.java:192) at org.apache.flink.runtime.io.network.api.writer.RecordWriter.emit(RecordWriter.java:162) at org.apache.flink.runtime.io.network.api.writer.RecordWriter.emit(RecordWriter.java:128) at org.apache.flink.streaming.runtime.io.RecordWriterOutput.pushToRecordWriter(RecordWriterOutput.java:107) at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:89) at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:45) at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:718) at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:696) at org.apache.flink.streaming.api.operators.StreamSourceContexts$NonTimestampContext.collect(StreamSourceContexts.java:104) - locked <0x000000074cbd3be0> (a java.lang.Object) at org.apache.flink.streaming.api.operators.StreamSourceContexts$NonTimestampContext.collectWithTimestamp(StreamSourceContexts.java:111) at org.apache.flink.streaming.connectors.kafka.internals.AbstractFetcher.emitRecordWithTimestamp(AbstractFetcher.java:398) - locked <0x000000074cbd3be0> (a java.lang.Object) at org.apache.flink.streaming.connectors.kafka.internal.Kafka010Fetcher.emitRecord(Kafka010Fetcher.java:91) at org.apache.flink.streaming.connectors.kafka.internal.Kafka09Fetcher.runFetchLoop(Kafka09Fetcher.java:156) at org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumerBase.run(FlinkKafkaConsumerBase.java:711) at com.dtstack.flink.sql.source.kafka.KafkaConsumer011.run(KafkaConsumer011.java:66) at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:93) at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:57) at org.apache.flink.streaming.runtime.tasks.SourceStreamTask.run(SourceStreamTask.java:97) at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:302) at org.apache.flink.runtime.taskmanager.Task.run(Task.java:711) at java.lang.Thread.run(Thread.java:748) Ada Luna <gfen...@gmail.com> 于2021年7月6日周二 上午10:13写道： > > 下面报错调大TaskManager内存即可解决，但是我不知道为什么Flink内存不够大会出现如下假死情况。申请内存卡住。整个任务状态为RUNNING但是不再消费数据。 > > > > "Map -> to: Tuple2 -> Map -> (from: (id, sid, item, val, unit, dt, > after_index, tablename, PROCTIME) -> where: (AND(=(tablename, > CONCAT(_UTF-16LE't_real', currtime2(dt, _UTF-16LE'yyyyMMdd'))), > OR(=(after_index, _UTF-16LE'2.6'), AND(=(sid, _UTF-16LE'7296'), > =(after_index, _UTF-16LE'2.10'))), LIKE(item, _UTF-16LE'??5%'), > =(MOD(getminutes(dt), 5), 0))), select: (id AS ID, sid AS STID, item > AS ITEM, val AS VAL, unit AS UNIT, dt AS DATATIME), from: (id, sid, > item, val, unit, dt, after_index, tablename, PROCTIME) -> where: > (AND(=(tablename, CONCAT(_UTF-16LE't_real', currtime2(dt, > _UTF-16LE'yyyyMMdd'))), OR(=(after_index, _UTF-16LE'2.6'), AND(=(sid, > _UTF-16LE'7296'), =(after_index, _UTF-16LE'2.10'))), LIKE(item, > _UTF-16LE'??5%'), =(MOD(getminutes(dt), 5), 0))), select: (sid AS > STID, val AS VAL, dt AS DATATIME)) (1/1)" #79 prio=5 os_prio=0 > tid=0x00007fd4c4a94000 nid=0x21c0 in Object.wait() > [0x00007fd4d5719000] > java.lang.Thread.State: TIMED_WAITING (on object monitor) > at java.lang.Object.wait(Native Method) > at > org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestMemorySegment(LocalBufferPool.java:251) > - locked <0x000000074e6c8b98> (a java.util.ArrayDeque) > at > org.apache.flink.runtime.io.network.buffer.LocalBufferPool.requestBufferBuilderBlocking(LocalBufferPool.java:218) > at > org.apache.flink.runtime.io.network.api.writer.RecordWriter.requestNewBufferBuilder(RecordWriter.java:264) > at > org.apache.flink.runtime.io.network.api.writer.RecordWriter.copyFromSerializerToTargetChannel(RecordWriter.java:192) > at > org.apache.flink.runtime.io.network.api.writer.RecordWriter.emit(RecordWriter.java:162) > at > org.apache.flink.runtime.io.network.api.writer.RecordWriter.emit(RecordWriter.java:128) > at > org.apache.flink.streaming.runtime.io.RecordWriterOutput.pushToRecordWriter(RecordWriterOutput.java:107) > at > org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:89) > at > org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:45) > at > org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:718) > at > org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:696) > at > org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:51) > at > org.apache.flink.table.runtime.CRowWrappingCollector.collect(CRowWrappingCollector.scala:37) > at > org.apache.flink.table.runtime.CRowWrappingCollector.collect(CRowWrappingCollector.scala:28) > at DataStreamCalcRule$4160.processElement(Unknown Source) > at > org.apache.flink.table.runtime.CRowProcessRunner.processElement(CRowProcessRunner.scala:66) > at > org.apache.flink.table.runtime.CRowProcessRunner.processElement(CRowProcessRunner.scala:35) > at > org.apache.flink.streaming.api.operators.ProcessOperator.processElement(ProcessOperator.java:66) > at > org.apache.flink.streaming.runtime.tasks.OperatorChain$ChainingOutput.pushToOperator(OperatorChain.java:488) > at > org.apache.flink.streaming.runtime.tasks.OperatorChain$ChainingOutput.collect(OperatorChain.java:465) > at > org.apache.flink.streaming.runtime.tasks.OperatorChain$ChainingOutput.collect(OperatorChain.java:425) > at > org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:718) > at > org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:696) > at > org.apache.flink.streaming.api.operators.TimestampedCollector.collect(TimestampedCollector.java:51) > at > org.apache.flink.table.runtime.CRowWrappingCollector.collect(CRowWrappingCollector.scala:37) > at > org.apache.flink.table.runtime.CRowWrappingCollector.collect(CRowWrappingCollector.scala:28) > at DataStreamSourceConversion$4104.processElement(Unknown Source) > at > org.apache.flink.table.runtime.CRowOutputProcessRunner.processElement(CRowOutputProcessRunner.scala:70) > at > org.apache.flink.streaming.api.operators.ProcessOperator.processElement(ProcessOperator.java:66) > at > org.apache.flink.streaming.runtime.tasks.OperatorChain$ChainingOutput.pushToOperator(OperatorChain.java:488) > at > org.apache.flink.streaming.runtime.tasks.OperatorChain$ChainingOutput.collect(OperatorChain.java:465) > at > org.apache.flink.streaming.runtime.tasks.OperatorChain$ChainingOutput.collect(OperatorChain.java:425) > at > org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingBroadcastingOutputCollector.collect(OperatorChain.java:686) > at > org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingBroadcastingOutputCollector.collect(OperatorChain.java:672) > at > org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:718) > at > org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:696) > at > org.apache.flink.streaming.api.operators.StreamMap.processElement(StreamMap.java:41) > at > org.apache.flink.streaming.runtime.tasks.OperatorChain$ChainingOutput.pushToOperator(OperatorChain.java:488) > at > org.apache.flink.streaming.runtime.tasks.OperatorChain$ChainingOutput.collect(OperatorChain.java:465) > at > org.apache.flink.streaming.runtime.tasks.OperatorChain$ChainingOutput.collect(OperatorChain.java:425) > at > org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:718) > at > org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:696) > at > org.apache.flink.streaming.api.operators.StreamMap.processElement(StreamMap.java:41) > at > org.apache.flink.streaming.runtime.tasks.OperatorChain$ChainingOutput.pushToOperator(OperatorChain.java:488) > at > org.apache.flink.streaming.runtime.tasks.OperatorChain$ChainingOutput.collect(OperatorChain.java:465) > at > org.apache.flink.streaming.runtime.tasks.OperatorChain$ChainingOutput.collect(OperatorChain.java:425) > at > org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:718) > at > org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:696) > at > org.apache.flink.streaming.api.operators.StreamMap.processElement(StreamMap.java:41) > at > org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(StreamInputProcessor.java:202) > - locked <0x000000074cb90938> (a java.lang.Object) > at > org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.run(OneInputStreamTask.java:105) > at > org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:302) > at org.apache.flink.runtime.taskmanager.Task.run(Task.java:711) > at java.lang.Thread.run(Thread.java:748)
