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[英]Apache Flink 1.4.2 com.esotericsoftware.kryo.KryoException: java.lang.UnsupportedOperationException
[英]Could not create class Caused by: com.esotericsoftware.kryo.KryoException: java.io.EOFException: No more bytes left
我發現在特定的小型集群和我的本地機器上運行作業時出現問題。 這項工作在大型機器上運行順利。 我正在使用:
我正在使用:
volumeMounts:
- name: rocksdb-volume
volume:
emptyDir:
sizeLimit: 5Gi
name: rocksdb-volume
volumeMount:
mountPath: /opt/flink/rocksdb
登錄到一個任務管理器,我可以看到路徑/opt/flink/rocksdb
有 1GB,而 k8s 沒有指示 DiskPressure。
並具有以下資源:
numberOfTaskManagers: 2
parallelism: 4
resources:
taskmanager:
cpu: 0.5
memory: 6G
2 個 6G 的 TM 與其他負載更高但運行良好的集群相比太多了。
我收到以下錯誤:
[FlinkOperatorName] (2/2)#15 (c2f42784dab9c9046192b067c0115499) switched from RUNNING to FAILED with failure cause: java.lang.RuntimeException: Could not create class [ProtobufClassName]
at com.twitter.chill.protobuf.ProtobufSerializer.read(ProtobufSerializer.java:76)
at com.twitter.chill.protobuf.ProtobufSerializer.read(ProtobufSerializer.java:40)
at com.esotericsoftware.kryo.Kryo.readClassAndObject(Kryo.java:761)
at org.apache.flink.api.java.typeutils.runtime.kryo.KryoSerializer.deserialize(KryoSerializer.java:354)
at org.apache.flink.api.scala.typeutils.OptionSerializer.deserialize(OptionSerializer.scala:76)
at org.apache.flink.api.scala.typeutils.OptionSerializer.deserialize(OptionSerializer.scala:29)
at org.apache.flink.api.scala.typeutils.CaseClassSerializer.deserialize(CaseClassSerializer.scala:126)
at org.apache.flink.api.scala.typeutils.CaseClassSerializer.deserialize(CaseClassSerializer.scala:32)
at org.apache.flink.streaming.runtime.streamrecord.StreamElementSerializer.deserialize(StreamElementSerializer.java:191)
at org.apache.flink.streaming.runtime.streamrecord.StreamElementSerializer.deserialize(StreamElementSerializer.java:46)
at org.apache.flink.runtime.plugable.NonReusingDeserializationDelegate.read(NonReusingDeserializationDelegate.java:53)
at org.apache.flink.runtime.io.network.api.serialization.SpillingAdaptiveSpanningRecordDeserializer.readNextRecord(SpillingAdaptiveSpanningRecordDeserializer.java:110)
at org.apache.flink.runtime.io.network.api.serialization.SpillingAdaptiveSpanningRecordDeserializer.getNextRecord(SpillingAdaptiveSpanningRecordDeserializer.java:93)
at org.apache.flink.streaming.runtime.io.AbstractStreamTaskNetworkInput.emitNext(AbstractStreamTaskNetworkInput.java:95)
at org.apache.flink.streaming.runtime.io.StreamOneInputProcessor.processInput(StreamOneInputProcessor.java:65)
at org.apache.flink.streaming.runtime.tasks.StreamTask.processInput(StreamTask.java:496)
at org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxLoop(MailboxProcessor.java:203)
at org.apache.flink.streaming.runtime.tasks.StreamTask.runMailboxLoop(StreamTask.java:809)
at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:761)
at org.apache.flink.runtime.taskmanager.Task.runWithSystemExitMonitoring(Task.java:958)
at org.apache.flink.runtime.taskmanager.Task.restoreAndInvoke(Task.java:937)
at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:766)
at org.apache.flink.runtime.taskmanager.Task.run(Task.java:575)
at java.base/java.lang.Thread.run(Unknown Source)
Caused by: com.esotericsoftware.kryo.KryoException: java.io.EOFException: No more bytes left.
at org.apache.flink.api.java.typeutils.runtime.NoFetchingInput.readBytes(NoFetchingInput.java:128)
at com.esotericsoftware.kryo.io.Input.readBytes(Input.java:314)
at com.twitter.chill.protobuf.ProtobufSerializer.read(ProtobufSerializer.java:73)
... 23 more
Caused by: java.io.EOFException: No more bytes left.
... 26 more
Protobuf + Kryo read + EOFException 表明問題可能出在讀取檢查點或保存點上。
我應該看什么?
該問題與添加到作為此作業輸入的 Kafka 主題的錯誤墓碑有關。
Kafka 區分null
和空的""
值。 我錯誤地輸入了""
而不是 null。
從錯誤堆棧跟蹤來看,問題不是發生在解串器代碼下,而是發生在其他地方。 不確定它如何構建一個 Protobuf Object 然后 Kryo 無法序列化。
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