[IOTDB-3177] [ concurrent delete dev ] NPE

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.14.0-SNAPSHOT
• Component/s: Core/Schema Manager
• Assignee: ZhaoXin
• Reporter: 刘珍
• Created: 13/May/22 09:30
• Updated: 05/Jul/22 05:48
• Resolved: 29/Jun/22 09:23

Description

master_0510_19872aa

问题描述：
10用户并发delete dev.** ，有如下问题：
2022-05-12 14:20:21,337 [pool-117-IoTDB-RPC-Client-71] ERROR o.a.i.d.u.ErrorHandlingUtils:59 - Status code: INTERNAL_SERVER_ERROR(500), operation: executeNonQueryPlan failed
java.lang.NullPointerException: null
at org.apache.iotdb.db.metadata.mtree.store.CachedMTreeStore$CachedMNodeIterator.readNext(CachedMTreeStore.java:535)
at org.apache.iotdb.db.metadata.mtree.store.CachedMTreeStore$CachedMNodeIterator.hasNext(CachedMTreeStore.java:507)
at org.apache.iotdb.db.metadata.mtree.MTreeBelowSGCachedImpl.deleteTimeseriesAndReturnEmptyStorageGroup(MTreeBelowSGCachedImpl.java:394)
at org.apache.iotdb.db.metadata.schemaregion.SchemaRegionSchemaFileImpl.deleteOneTimeseriesUpdateStatisticsAndDropTrigger(SchemaRegionSchemaFileImpl.java:751)
at org.apache.iotdb.db.metadata.schemaregion.SchemaRegionSchemaFileImpl.deleteSingleTimeseriesInternal(SchemaRegionSchemaFileImpl.java:728)
at org.apache.iotdb.db.metadata.schemaregion.SchemaRegionSchemaFileImpl.deleteTimeseries(SchemaRegionSchemaFileImpl.java:704)
at org.apache.iotdb.db.metadata.LocalSchemaProcessor.deleteTimeseries(LocalSchemaProcessor.java:364)
at org.apache.iotdb.db.qp.executor.PlanExecutor.deleteTimeSeries(PlanExecutor.java:2067)
at org.apache.iotdb.db.qp.executor.PlanExecutor.processNonQuery(PlanExecutor.java:334)
at org.apache.iotdb.db.service.basic.StandaloneServiceProvider.executeNonQuery(StandaloneServiceProvider.java:53)
at org.apache.iotdb.db.service.thrift.impl.TSServiceImpl.executeNonQueryPlan(TSServiceImpl.java:2066)
at org.apache.iotdb.db.service.thrift.impl.TSServiceImpl.executeNonQueryStatement(TSServiceImpl.java:1114)
at org.apache.iotdb.db.service.thrift.impl.TSServiceImpl.executeUpdateStatement(TSServiceImpl.java:1107)
at org.apache.iotdb.db.service.thrift.impl.TSServiceImpl.executeStatement(TSServiceImpl.java:622)
at org.apache.iotdb.service.rpc.thrift.TSIService$Processor$executeStatement.getResult(TSIService.java:2853)
at org.apache.iotdb.service.rpc.thrift.TSIService$Processor$executeStatement.getResult(TSIService.java:2833)
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)
2022-05-12 14:20:21,694 [pool-117-IoTDB-RPC-Client-63] ERROR o.a.i.d.u.ErrorHandlingUtils:59 - Status code: INTERNAL_SERVER_ERROR(500), operation: executeNonQueryPlan failed
java.lang.NullPointerException: null

操作流程
1. 192.168.10.68
使用数据备份启动数据库：/data/liuzhen_test/master_0510_19872aa/data_flush_stop_0511
复制这个备份，不要直接使用它。

2. 启动成功后，执行并发delete dev.**脚本
见附件