> 有没有可能flink在读取savepoint文件时,就做了反序列化,在这个过程中失败了。

确实是这样的,checkpoint 把 serializer 也 snapshot 了。

重新看了下 stack,应该是 deserialize `MessageId` 的时候出错的。你可以看下,pulsar
的版本是不是也有变动?有的话,这两个版本之间的某个 `MessageId` 实现是不是有字段变动?感觉你们应该用
`MessageId.toByteArray`。


On March 11, 2021 at 20:26:15, 赵 建云 (zhaojianyu...@outlook.com) wrote:

你好,我参考StatefulSinkWriterOperator重写了迁移方法,进行测试,还是遇到了上面的错误。 这个错误似乎发生在source的
initializeState之前。有没有可能flink在读取savepoint文件时,就做了反序列化,在这个过程中失败了。请问有什么办法能帮忙定位吗?

感谢~


2021年3月11日 上午11:36,Kezhu Wang <kez...@gmail.com> 写道:

新的集群使用的是更新之后的 pulsar connector ?我看了下 pulsar-flink 的代码,这个更新对 state 是破坏性的。

+        unionOffsetStates = stateStore.getUnionListState(
+                new ListStateDescriptor<>(
+                        OFFSETS_STATE_NAME,
+                        TypeInformation.of(new TypeHint<Tuple3<String,
MessageId, String>>() {
+                        })));

解决方法 :?
1. 尝试通过 state-processor-api 重写下 state ?
2. 1.9 的 pulsar-flink connector 可以跑在 1.11 的 flink 上吗?

感觉后面还有不兼容的更新

                 new ListStateDescriptor<>(
                         OFFSETS_STATE_NAME,
-                        TypeInformation.of(new TypeHint<Tuple3<String,
MessageId, String>>() {
+                        TypeInformation.of(new TypeHint<Tuple3<TopicRange,
MessageId, String>>() {
                         })));


不兼容的 state 更新,如果不好做 schema migration,可以试试 StatefulSinkWriterOperator
的方法:同时读取新旧 state + 只写新 state。

可以等 streamnative 的人确认下。

On March 11, 2021 at 10:43:53, 赵 建云 (zhaojianyu...@outlook.com) wrote:

社区各位大佬,我遇到了一个Flink版本升级后,savepoint不会正确恢复问题。

版本从1.9.3 升级到1.11.0或1.11.3.
连接器使用的pulsar的连接器。在Source的checkpoint数据结构如下

oldUnionOffsetStates = stateStore.getUnionListState(
new ListStateDescriptor<>(
OFFSETS_STATE_NAME,
TypeInformation.of(new TypeHint<Tuple2<String, MessageId>>() {
})));
oldUnionSubscriptionNameStates =
stateStore.getUnionListState(
new ListStateDescriptor<>(
OFFSETS_STATE_NAME + "_subName",
TypeInformation.of(new TypeHint<String>() {
})));
我在本地通过bin/flink savepoint 命令保存下1.9.3的state,然后停止flink
1.9.3的集群,启动1.11.3的flink集群,使用bin/flink run -s 参数恢复任务。
任务在启动后,会遇到下面的错误


2021-03-11 10:02:25
java.lang.Exception: Exception while creating StreamOperatorStateContext.
at
org.apache.flink.streaming.api.operators.StreamTaskStateInitializerImpl.streamOperatorStateContext(StreamTaskStateInitializerImpl.java:222)

at
org.apache.flink.streaming.api.operators.AbstractStreamOperator.initializeState(AbstractStreamOperator.java:248)

at
org.apache.flink.streaming.runtime.tasks.OperatorChain.initializeStateAndOpenOperators(OperatorChain.java:290)

at
org.apache.flink.streaming.runtime.tasks.StreamTask.lambda$beforeInvoke$1(StreamTask.java:506)

at
org.apache.flink.streaming.runtime.tasks.StreamTaskActionExecutor$SynchronizedStreamTaskActionExecutor.runThrowing(StreamTaskActionExecutor.java:92)

at
org.apache.flink.streaming.runtime.tasks.StreamTask.beforeInvoke(StreamTask.java:475)

at
org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:526)

at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:721)
at org.apache.flink.runtime.taskmanager.Task.run(Task.java:546)
at java.base/java.lang.Thread.run(Thread.java:832)
Caused by: org.apache.flink.util.FlinkException: Could not restore operator
state backend for StreamSource_15541fe0b20ca4f01df784b178a8cc9d_(1/1) from
any of the 1 provided restore options.
at
org.apache.flink.streaming.api.operators.BackendRestorerProcedure.createAndRestore(BackendRestorerProcedure.java:135)

at
org.apache.flink.streaming.api.operators.StreamTaskStateInitializerImpl.operatorStateBackend(StreamTaskStateInitializerImpl.java:283)

at
org.apache.flink.streaming.api.operators.StreamTaskStateInitializerImpl.streamOperatorStateContext(StreamTaskStateInitializerImpl.java:156)

... 9 more
Caused by: org.apache.flink.runtime.state.BackendBuildingException: Failed
when trying to restore operator state backend
at
org.apache.flink.runtime.state.DefaultOperatorStateBackendBuilder.build(DefaultOperatorStateBackendBuilder.java:86)

at
org.apache.flink.runtime.state.memory.MemoryStateBackend.createOperatorStateBackend(MemoryStateBackend.java:314)

at
org.apache.flink.streaming.api.operators.StreamTaskStateInitializerImpl.lambda$operatorStateBackend$0(StreamTaskStateInitializerImpl.java:274)

at
org.apache.flink.streaming.api.operators.BackendRestorerProcedure.attemptCreateAndRestore(BackendRestorerProcedure.java:142)

at
org.apache.flink.streaming.api.operators.BackendRestorerProcedure.createAndRestore(BackendRestorerProcedure.java:121)

... 11 more
Caused by: java.io
<https://apac01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fjava.io%2F&data=04%7C01%7C%7C06cd7ca48a8f481f58d708d8e43ed127%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637510305734207224%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=MUHizKkvqUL0ebXqE5BXu2eewLmBRUuakj44pV0bZfg%3D&reserved=0>
<http://java.io
<https://apac01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fjava.io%2F&data=04%7C01%7C%7C06cd7ca48a8f481f58d708d8e43ed127%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637510305734217175%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=VU%2Bgy0%2B6u%2BVe0Qj1maU3nvijfSH9hBdQApSnfFjq9G8%3D&reserved=0>>.EOFException:
No more bytes left.
at
org.apache.flink.api.java.typeutils.runtime.NoFetchingInput.require(NoFetchingInput.java:79)

at com.esotericsoftware.kryo.io
<https://apac01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fcom.esotericsoftware.kryo.io%2F&data=04%7C01%7C%7C06cd7ca48a8f481f58d708d8e43ed127%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637510305734217175%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=GOPIGWBHoGVAMJG0viu7heBsBPl%2BfUi5cwBwZcFe8zo%3D&reserved=0>
<http://com.esotericsoftware.kryo.io
<https://apac01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fcom.esotericsoftware.kryo.io%2F&data=04%7C01%7C%7C06cd7ca48a8f481f58d708d8e43ed127%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637510305734227129%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=yk%2FHHiP8ik858sh%2FPHRpyaqBgYYylIgbJKAlyZVAS%2Fk%3D&reserved=0>
>.Input.readVarInt(Input.java:355)
at com.esotericsoftware.kryo.io
<https://apac01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fcom.esotericsoftware.kryo.io%2F&data=04%7C01%7C%7C06cd7ca48a8f481f58d708d8e43ed127%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637510305734227129%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=yk%2FHHiP8ik858sh%2FPHRpyaqBgYYylIgbJKAlyZVAS%2Fk%3D&reserved=0>
<http://com.esotericsoftware.kryo.io
<https://apac01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fcom.esotericsoftware.kryo.io%2F&data=04%7C01%7C%7C06cd7ca48a8f481f58d708d8e43ed127%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637510305734227129%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=yk%2FHHiP8ik858sh%2FPHRpyaqBgYYylIgbJKAlyZVAS%2Fk%3D&reserved=0>
>.Input.readInt(Input.java:350)
at
com.esotericsoftware.kryo.serializers.UnsafeCacheFields$UnsafeIntField.read(UnsafeCacheFields.java:46)

at
com.esotericsoftware.kryo.serializers.FieldSerializer.read(FieldSerializer.java:528)

at com.esotericsoftware.kryo.Kryo.readClassAndObject(Kryo.java:761)
at
org.apache.flink.api.java.typeutils.runtime.kryo.KryoSerializer.deserialize(KryoSerializer.java:346)

at
org.apache.flink.api.java.typeutils.runtime.TupleSerializer.deserialize(TupleSerializer.java:151)

at
org.apache.flink.api.java.typeutils.runtime.TupleSerializer.deserialize(TupleSerializer.java:37)

at
org.apache.flink.runtime.state.OperatorStateRestoreOperation.deserializeOperatorStateValues(OperatorStateRestoreOperation.java:191)

at
org.apache.flink.runtime.state.OperatorStateRestoreOperation.restore(OperatorStateRestoreOperation.java:165)

at
org.apache.flink.runtime.state.DefaultOperatorStateBackendBuilder.build(DefaultOperatorStateBackendBuilder.java:83)

... 15 more

请问题大佬们可以提供排查问题的办法或者解决方案吗?


Jianyun8023
2021-3-11

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