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https://issues.apache.org/jira/browse/FLINK-26347?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yingjie Cao updated FLINK-26347:
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Description: FLINK-25742 removed the redundant serialization of RPC
invocation at Flink side. However, by accident, it changes the class loading
behavior. Before FLINK-25742, Flink system Classloader is used to load RPC
message class, but after FLINK-25742, the RpcSystem Classloader (its parent
Classloader is not Flink system Classloader) is used which can cause
ClassNotFoundException. I encountered this exception when trying to run
flink-remote-shuffle on the latest Flink 1.15-SNAPSHOT, the remote shuffle
class (shuffle descriptor class) can not be found even when the corresponding
jar file is in Flink lib/ directory. (was: FLINK-25742 removed the redundant
serialization of RPC invocation at Flink side. However, by accident, which
changes the class loading behavior. Before FLINK-25742, Flink system
Classloader is used to load RPC message class, but after FLINK-25742, the
RpcSystem Classloader (its parent Classloader is not Flink system Classloader)
is used which can cause ClassNotFoundException. I encountered this exception
when trying to run flink-remote-shuffle on the latest Flink 1.15-SNAPSHOT, the
remote shuffle class (shuffle descriptor class) can not be found even when the
corresponding jar file is in Flink lib/ directory.)
> Should use Flink system Classloader (AppClassloader) when deserializing RPC
> message
> -----------------------------------------------------------------------------------
>
> Key: FLINK-26347
> URL: https://issues.apache.org/jira/browse/FLINK-26347
> Project: Flink
> Issue Type: Bug
> Affects Versions: 1.15.0
> Reporter: Yingjie Cao
> Priority: Blocker
> Fix For: 1.15.0
>
>
> FLINK-25742 removed the redundant serialization of RPC invocation at Flink
> side. However, by accident, it changes the class loading behavior. Before
> FLINK-25742, Flink system Classloader is used to load RPC message class, but
> after FLINK-25742, the RpcSystem Classloader (its parent Classloader is not
> Flink system Classloader) is used which can cause ClassNotFoundException. I
> encountered this exception when trying to run flink-remote-shuffle on the
> latest Flink 1.15-SNAPSHOT, the remote shuffle class (shuffle descriptor
> class) can not be found even when the corresponding jar file is in Flink lib/
> directory.
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