This error comes because you changed state backends. The checkpoint was written by a different state backend. This is not supported.
To use incremental checkpoints, you must only use the RocksDbStateBackend: first, when running the job and writing the checkpoint, and again later when restarting. Best, David On Mon, Oct 5, 2020 at 2:38 PM 大森林 <appleyu...@foxmail.com> wrote: > Could you give more details? > Thanks > > > ------------------ 原始邮件 ------------------ > *发件人:* "大森林" <appleyu...@foxmail.com>; > *发送时间:* 2020年10月3日(星期六) 上午9:30 > *收件人:* "David Anderson"<dander...@apache.org>; > *抄送:* "user"<user@flink.apache.org>; > *主题:* 回复： need help about "incremental checkpoint",Thanks > > where's the actual path? > I can only get one path from the WEB UI > > Is it possible that this error happened in step 5 is due to my code's > fault? > > ------------------ 原始邮件 ------------------ > *发件人:* "大森林" <753743...@qq.com>; > *发送时间:* 2020年10月3日(星期六) 上午9:13 > *收件人:* "David Anderson"<dander...@apache.org>; > *抄送:* "user"<user@flink.apache.org>; > *主题:* 回复： need help about "incremental checkpoint",Thanks > > *Thanks~!!* > > *I have compared your command with mine in step 5.* > Mine is: > * "*flink run -s > hdfs://Desktop:9000/tmp/flinkck/df6d62a43620f258155b8538ef0ddf1b/chk-22 -c > StateWordCount datastream_api-1.0-SNAPSHOT.jar*"* > *yours is:* > $ bin/flink run -s > hdfs://Desktop:9000/tmp/flinkck/1de98c1611c134d915d19ded33aeab54/chk-3 <jar > file> [args] > *They are the same.* > *Could you tell me where am I wrong?* > > ------------------------------------------------------------------------------------------------------------------------ > *Maybe the error is not caused by this command?* > "Unexpected state handle type, expected: > *class org.apache.flink.runtime.state.KeyGroupsStateHandle, * > but found: > *class org.apache.flink.runtime.state.IncrementalRemoteKeyedStateHandle"* > > ---------------------------------------------------------------------------------------------------------------------------------- > > Thanks~ > > ------------------ 原始邮件 ------------------ > *发件人:* "David Anderson" <dander...@apache.org>; > *发送时间:* 2020年10月3日(星期六) 凌晨0:05 > *收件人:* "大森林"<753743...@qq.com>; > *抄送:* "user"<user@flink.apache.org>; > *主题:* Re: need help about "incremental checkpoint",Thanks > > If hdfs://Desktop:9000/tmp/flinkck/1de98c1611c134d915d19ded33aeab54/chk-3 > was written by the RocksDbStateBackend, then you can use it to recover if > the new job is also using the RocksDbStateBackend. The command would be > > $ bin/flink run -s > hdfs://Desktop:9000/tmp/flinkck/1de98c1611c134d915d19ded33aeab54/chk-3 <jar > file> [args] > > The ":" character is meant to indicate that you should not use the literal > string "checkpointMetaDataPath", but rather replace that with the actual > path. Do not include the : character. > > David > > On Fri, Oct 2, 2020 at 5:58 PM 大森林 <753743...@qq.com> wrote: > > > > I have read the official document > > > https://ci.apache.org/projects/flink/flink-docs-release-1.10/ops/state/checkpoints.html#directory-structure > > > > at the end of above link,it said: > > > > $ bin/flink run -s :checkpointMetaDataPath [:runArgs] > > > > I have tried the above command in previous experiment,but still no luck. > > And why the above official command has " :" after "run -s"? > > I guess " :" not necessary. > > > > Could you tell me what the right command is to recover(resume) from > incremental checkpoint(RocksdbStateBackEnd)? > > > > Much Thanks~! > > > > > > ------------------ 原始邮件 ------------------ > > 发件人: "大森林" <appleyu...@foxmail.com>; > > 发送时间: 2020年10月2日(星期五) 晚上11:41 > > 收件人: "David Anderson"<dander...@apache.org>; > > 抄送: "user"<user@flink.apache.org>; > > 主题: 回复： need help about "incremental checkpoint",Thanks > > > > Thanks for your replies~! > > > > Could you tell me what the right command is to recover from checkpoint > manually using Rocksdb file? > > > > I understand that checkpoint is for automatically recovery, > > but in this experiment I stop it by force(input 4 error in nc -lk 9999), > > Is there a way to recover from incremental checkpoint manually ( with > RocksdbStateBackend)? > > > > I can only find > hdfs://Desktop:9000/tmp/flinkck/1de98c1611c134d915d19ded33aeab54/chk-3 in > my WEB UI (I guess this is only used for fsStateBackend) > > > > Thanks for your help~! > > > > ------------------ 原始邮件 ------------------ > > 发件人: "David Anderson" <dander...@apache.org>; > > 发送时间: 2020年10月2日(星期五) 晚上11:24 > > 收件人: "大森林"<appleyu...@foxmail.com>; > > 抄送: "user"<user@flink.apache.org>; > > 主题: Re: need help about "incremental checkpoint",Thanks > > > >> Write in RocksDbStateBackend. > >> Read in FsStateBackend. > >> It's NOT a match. > > > > > > Yes, that is right. Also, this does not work: > > > > Write in FsStateBackend > > Read in RocksDbStateBackend > > > > For questions and support in Chinese, you can use the > user...@flink.apache.org. See the instructions at > https://flink.apache.org/zh/community.html for how to join the list. > > > > Best, > > David > > > > On Fri, Oct 2, 2020 at 4:45 PM 大森林 <appleyu...@foxmail.com> wrote: > >> > >> Thanks for your replies~! > >> > >> My English is poor ,I have an understanding of your replies: > >> > >> Write in RocksDbStateBackend. > >> Read in FsStateBackend. > >> It's NOT a match. > >> So I'm wrong in step 5? > >> Is my above understanding right? > >> > >> Thanks for your help. > >> > >> ------------------ 原始邮件 ------------------ > >> 发件人: "David Anderson" <dander...@apache.org>; > >> 发送时间: 2020年10月2日(星期五) 晚上10:35 > >> 收件人: "大森林"<appleyu...@foxmail.com>; > >> 抄送: "user"<user@flink.apache.org>; > >> 主题: Re: need help about "incremental checkpoint",Thanks > >> > >> It looks like you were trying to resume from a checkpoint taken with > the FsStateBackend into a revised version of the job that uses the > RocksDbStateBackend. Switching state backends in this way is not supported: > checkpoints and savepoints are written in a state-backend-specific format, > and can only be read by the same backend that wrote them. > >> > >> It is possible, however, to migrate between state backends using the > State Processor API [1]. > >> > >> [1] > https://ci.apache.org/projects/flink/flink-docs-stable/dev/libs/state_processor_api.html > >> > >> Best, > >> David > >> > >> On Fri, Oct 2, 2020 at 4:07 PM 大森林 <appleyu...@foxmail.com> wrote: > >>> > >>> I want to do an experiment of"incremental checkpoint" > >>> > >>> my code is: > >>> > >>> https://paste.ubuntu.com/p/DpTyQKq6Vk/ > >>> > >>> > >>> > >>> pom.xml is: > >>> > >>> <?xml version="1.0" encoding="UTF-8"?> > >>> <project xmlns="http://maven.apache.org/POM/4.0.0"; > >>> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; > >>> xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 > http://maven.apache.org/xsd/maven-4.0.0.xsd";> > >>> <modelVersion>4.0.0</modelVersion> > >>> > >>> <groupId>example</groupId> > >>> <artifactId>datastream_api</artifactId> > >>> <version>1.0-SNAPSHOT</version> > >>> <build> > >>> <plugins> > >>> <plugin> > >>> <groupId>org.apache.maven.plugins</groupId> > >>> <artifactId>maven-compiler-plugin</artifactId> > >>> <version>3.1</version> > >>> <configuration> > >>> <source>1.8</source> > >>> <target>1.8</target> > >>> </configuration> > >>> </plugin> > >>> > >>> <plugin> > >>> <groupId>org.scala-tools</groupId> > >>> <artifactId>maven-scala-plugin</artifactId> > >>> <version>2.15.2</version> > >>> <executions> > >>> <execution> > >>> <goals> > >>> <goal>compile</goal> > >>> <goal>testCompile</goal> > >>> </goals> > >>> </execution> > >>> </executions> > >>> </plugin> > >>> > >>> > >>> > >>> </plugins> > >>> </build> > >>> > >>> <dependencies> > >>> > >>> <!-- > https://mvnrepository.com/artifact/org.apache.flink/flink-streaming-scala > --> > >>> <dependency> > >>> <groupId>org.apache.flink</groupId> > >>> <artifactId>flink-streaming-scala_2.11</artifactId> > >>> <version>1.11.1</version> > >>> <!-<scope>provided</scope>-> > >>> </dependency> > >>> > >>> <!-<dependency>-> > >>> <!-<groupId>org.apache.flink</groupId>-> > >>> <!-<artifactId>flink-streaming-java_2.12</artifactId>-> > >>> <!-<version>1.11.1</version>-> > >>> <!-<!–<scope>compile</scope>–>-> > >>> <!-</dependency>-> > >>> > >>> <dependency> > >>> <groupId>org.apache.flink</groupId> > >>> <artifactId>flink-clients_2.11</artifactId> > >>> <version>1.11.1</version> > >>> </dependency> > >>> > >>> > >>> > >>> <dependency> > >>> <groupId>org.apache.flink</groupId> > >>> <artifactId>flink-statebackend-rocksdb_2.11</artifactId> > >>> <version>1.11.2</version> > >>> <!-<scope>test</scope>-> > >>> </dependency> > >>> > >>> <dependency> > >>> <groupId>org.apache.hadoop</groupId> > >>> <artifactId>hadoop-client</artifactId> > >>> <version>3.3.0</version> > >>> </dependency> > >>> > >>> <dependency> > >>> <groupId>org.apache.flink</groupId> > >>> <artifactId>flink-core</artifactId> > >>> <version>1.11.1</version> > >>> </dependency> > >>> > >>> <!-<dependency>-> > >>> <!-<groupId>org.slf4j</groupId>-> > >>> <!-<artifactId>slf4j-simple</artifactId>-> > >>> <!-<version>1.7.25</version>-> > >>> <!-<scope>compile</scope>-> > >>> <!-</dependency>-> > >>> > >>> <!-- https://mvnrepository.com/artifact/org.apache.flink/flink-cep --> > >>> <dependency> > >>> <groupId>org.apache.flink</groupId> > >>> <artifactId>flink-cep_2.11</artifactId> > >>> <version>1.11.1</version> > >>> </dependency> > >>> > >>> <dependency> > >>> <groupId>org.apache.flink</groupId> > >>> <artifactId>flink-cep-scala_2.11</artifactId> > >>> <version>1.11.1</version> > >>> </dependency> > >>> > >>> <dependency> > >>> <groupId>org.apache.flink</groupId> > >>> <artifactId>flink-scala_2.11</artifactId> > >>> <version>1.11.1</version> > >>> </dependency> > >>> > >>> > >>> > >>> <dependency> > >>> <groupId>org.projectlombok</groupId> > >>> <artifactId>lombok</artifactId> > >>> <version>1.18.4</version> > >>> <!-<scope>provided</scope>-> > >>> </dependency> > >>> > >>> </dependencies> > >>> </project> > >>> > >>> > >>> > >>> the error I got is: > >>> > >>> https://paste.ubuntu.com/p/49HRYXFzR2/ > >>> > >>> > >>> > >>> some of the above error is: > >>> > >>> Caused by: java.lang.IllegalStateException: Unexpected state handle > type, expected: class org.apache.flink.runtime.state.KeyGroupsStateHandle, > but found: class > org.apache.flink.runtime.state.IncrementalRemoteKeyedStateHandle > >>> > >>> > >>> > >>> > >>> > >>> The steps are: > >>> > >>> 1.mvn clean scala:compile compile package > >>> > >>> 2.nc -lk 9999 > >>> > >>> 3.flink run -c wordcount_increstate datastream_api-1.0-SNAPSHOT.jar > >>> Job has been submitted with JobID df6d62a43620f258155b8538ef0ddf1b > >>> > >>> 4.input the following conents in nc -lk 9999 > >>> > >>> before > >>> error > >>> error > >>> error > >>> error > >>> > >>> 5. > >>> > >>> flink run -s > hdfs://Desktop:9000/tmp/flinkck/df6d62a43620f258155b8538ef0ddf1b/chk-22 -c > StateWordCount datastream_api-1.0-SNAPSHOT.jar > >>> > >>> Then the above error happens. > >>> > >>> > >>> > >>> Please help,Thanks~! > >>> > >>> > >>> I have tried to subscried to user@flink.apache.org; > >>> > >>> but no replies.If possible ,send to appleyu...@foxmail.com with your > valuable replies,thanks. > >>> > >>> >
