need help about "incremental checkpoint",Thanks
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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"?> <groupId>example</groupId> <plugin>
</plugins> <dependencies> <!-- https://mvnrepository.com/artifact/org.apache.flink/flink-streaming-scala --> <!- <dependency>
<dependency> <dependency> <dependency> <!- <!-- https://mvnrepository.com/artifact/org.apache.flink/flink-cep --> <dependency> <dependency>
<dependency> </dependencies>
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 4.input the following conents in nc -lk 9999 before 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 [hidden email]; but no replies.If possible ,send to [hidden email] with your valuable replies,thanks.
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Re: need help about "incremental checkpoint",Thanks
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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]. Best, David On Fri, Oct 2, 2020 at 4:07 PM 大森林 <[hidden email]> wrote:
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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" <[hidden email]>; 发送时间: 2020年10月2日(星期五) 晚上10:35 收件人: "大森林"<[hidden email]>; 抄送: "user"<[hidden email]>; 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]. Best, David On Fri, Oct 2, 2020 at 4:07 PM 大森林 <[hidden email]> wrote:
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Re: need help about "incremental checkpoint",Thanks
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Write in RocksDbStateBackend. 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 [hidden email]. 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 <[hidden email]> wrote:
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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" <[hidden email]>; 发送时间: 2020年10月2日(星期五) 晚上11:24 收件人: "大森林"<[hidden email]>; 抄送: "user"<[hidden email]>; 主题: Re: need help about "incremental checkpoint",Thanks Write in RocksDbStateBackend. 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 [hidden email]. 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 <[hidden email]> wrote:
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Re: need help about "incremental checkpoint",Thanks
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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 <[hidden email]> 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" <[hidden email]>; > 发送时间: 2020年10月2日(星期五) 晚上11:41 > 收件人: "David Anderson"<[hidden email]>; > 抄送: "user"<[hidden email]>; > 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" <[hidden email]>; > 发送时间: 2020年10月2日(星期五) 晚上11:24 > 收件人: "大森林"<[hidden email]>; > 抄送: "user"<[hidden email]>; > 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 [hidden email]. 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 <[hidden email]> 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" <[hidden email]>; >> 发送时间: 2020年10月2日(星期五) 晚上10:35 >> 收件人: "大森林"<[hidden email]>; >> 抄送: "user"<[hidden email]>; >> 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 <[hidden email]> 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 [hidden email]; >>> >>> but no replies.If possible ,send to [hidden email] with your valuable replies,thanks. >>> >>> |
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