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https://issues.apache.org/jira/browse/IOTDB-4294?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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刘珍 reopened IOTDB-4294:
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> [ mem leak ] Request metadata timed out, causing memory leak
> ------------------------------------------------------------
>
> Key: IOTDB-4294
> URL: https://issues.apache.org/jira/browse/IOTDB-4294
> Project: Apache IoTDB
> Issue Type: Bug
> Components: mpp-cluster
> Affects Versions: 0.14.0-SNAPSHOT
> Reporter: 刘珍
> Assignee: Yuan Tian
> Priority: Major
> Labels: pull-request-available
> Attachments: add_dn.conf, screenshot-1.png, screenshot-2.png,
> screenshot-3.png
>
>
> master_0830_42fcbfc
> schema_region_consensus_protocol_class=org.apache.iotdb.consensus.standalone.{color:#DE350B}*StandAloneConsensus*{color}
> {color:#DE350B}*schemaregion 1副本*{color}
> dataregion 3副本
> 先启动1confignode，3datanode，启动benchmark，只有写入，{color:#DE350B}15小时后，大量写入失败{color}，下图是统计每小时的写入数据量：
> !screenshot-1.png!
> ip5 error
> 2022-08-30 18:01:04,256 [20220830_094446_42966_3.1.0-1068] ERROR
> o.a.i.d.m.e.f.FragmentInstanceManager:157 - Execute error caused by
> org.apache.iotdb.db.mpp.exception.MemoryNotEnoughException: There is not
> enough memory to execute current fragment instance, current remaining free
> memory is 1014007, estimated memory usage for current fragment instance is
> 1048576
> at
> org.apache.iotdb.db.mpp.plan.planner.LocalExecutionPlanner.checkMemory(LocalExecutionPlanner.java:132)
> at
> org.apache.iotdb.db.mpp.plan.planner.LocalExecutionPlanner.plan(LocalExecutionPlanner.java:104)
> at
> org.apache.iotdb.db.mpp.execution.fragment.FragmentInstanceManager.lambda$execSchemaQueryFragmentInstance$3(FragmentInstanceManager.java:147)
> at
> java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660)
> at
> org.apache.iotdb.db.mpp.execution.fragment.FragmentInstanceManager.execSchemaQueryFragmentInstance(FragmentInstanceManager.java:133)
> at
> org.apache.iotdb.db.consensus.statemachine.SchemaRegionStateMachine.read(SchemaRegionStateMachine.java:94)
> at
> org.apache.iotdb.consensus.standalone.StandAloneServerImpl.read(StandAloneServerImpl.java:72)
> at
> org.apache.iotdb.consensus.standalone.StandAloneConsensus.read(StandAloneConsensus.java:135)
> at
> org.apache.iotdb.db.service.thrift.impl.DataNodeInternalRPCServiceImpl.sendFragmentInstance(DataNodeInternalRPCServiceImpl.java:169)
> at
> org.apache.iotdb.mpp.rpc.thrift.IDataNodeRPCService$Processor$sendFragmentInstance.getResult(IDataNodeRPCService.java:2136)
> at
> org.apache.iotdb.mpp.rpc.thrift.IDataNodeRPCService$Processor$sendFragmentInstance.getResult(IDataNodeRPCService.java:2116)
> at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:38)
> at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:38)
> at
> org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:248)
> 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)
> 复现流程
> 1. 172.20.70.3/4/5 8c32G datanode
> 172.20.70.31 confignode 8c32G
> benchmark在ip15 /data/benchmark/bm_0620_7ec96c1
> 集群与regions信息
> !screenshot-2.png!
> 2. 数据库配置参数
> confignode
> MAX_HEAP_SIZE="16G"
> schema_region_consensus_protocol_class=org.apache.iotdb.consensus.standalone.StandAloneConsensus
> data_region_consensus_protocol_class=org.apache.iotdb.consensus.multileader.MultiLeaderConsensus
> schema_replication_factor=1
> data_replication_factor=3
> datanode
> MAX_HEAP_SIZE="16G"
> wal_buffer_size_in_byte=1048576
> max_waiting_time_when_insert_blocked=3600000
> 3. 启动bm 配置文件见附件
> 4. 后续还有add datanode（20分钟 加1个datanode，共加6个）
> ip 2/13/14/16/18/19
> 但是没有新的写入操作，所以这些新的datanode上没有数据。
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