mattisonchao opened a new pull request #14316:
URL: https://github.com/apache/pulsar/pull/14316
### Motivation
Users who use the ``WebSocket`` API to create a new reader with the
partitioned topic will get ``ClassCastException``.
```java
15:44:23.004 [pulsar-websocket-web-1-5] WARN
org.apache.pulsar.websocket.ReaderHandler - [10.130.0.83:35389] Failed in
creating reader on topic persistent://bt_sp_prod/theos_interp_v1/spy_option
java.lang.ClassCastException: class
org.apache.pulsar.client.impl.MultiTopicsReaderImpl cannot be cast to class
org.apache.pulsar.client.impl.ReaderImpl
(org.apache.pulsar.client.impl.MultiTopicsReaderImpl and
org.apache.pulsar.client.impl.ReaderImpl are in unnamed module of loader 'app')
at
org.apache.pulsar.websocket.ReaderHandler.<init>(ReaderHandler.java:107)
~[io.streamnative-pulsar-websocket-2.8.2.2.jar:2.8.2.2]
at
org.apache.pulsar.websocket.WebSocketReaderServlet.lambda$configure$0(WebSocketReaderServlet.java:44)
~[io.streamnative-pulsar-websocket-2.8.2.2.jar:2.8.2.2]
at
org.eclipse.jetty.websocket.server.WebSocketServerFactory.acceptWebSocket(WebSocketServerFactory.java:230)
~[org.eclipse.jetty.websocket-websocket-server-9.4.43.v20210629.jar:9.4.43.v20210629]
at
org.eclipse.jetty.websocket.server.WebSocketServerFactory.acceptWebSocket(WebSocketServerFactory.java:215)
~[org.eclipse.jetty.websocket-websocket-server-9.4.43.v20210629.jar:9.4.43.v20210629]
at
org.eclipse.jetty.websocket.servlet.WebSocketServlet.service(WebSocketServlet.java:160)
~[org.eclipse.jetty.websocket-websocket-servlet-9.4.43.v20210629.jar:9.4.43.v20210629]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
~[javax.servlet-javax.servlet-api-3.1.0.jar:3.1.0]
at
org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:799)
~[org.eclipse.jetty-jetty-servlet-9.4.43.v20210629.jar:9.4.43.v20210629]
at
org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:550)
~[org.eclipse.jetty-jetty-servlet-9.4.43.v20210629.jar:9.4.43.v20210629]
at
org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
~[org.eclipse.jetty-jetty-server-9.4.43.v20210629.jar:9.4.43.v20210629]
at
org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1624)
~[org.eclipse.jetty-jetty-server-9.4.43.v20210629.jar:9.4.43.v20210629]
at
org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
~[org.eclipse.jetty-jetty-server-9.4.43.v20210629.jar:9.4.43.v20210629]
at
org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1434)
~[org.eclipse.jetty-jetty-server-9.4.43.v20210629.jar:9.4.43.v20210629]
at
org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
~[org.eclipse.jetty-jetty-server-9.4.43.v20210629.jar:9.4.43.v20210629]
at
org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:501)
~[org.eclipse.jetty-jetty-servlet-9.4.43.v20210629.jar:9.4.43.v20210629]
at
org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1594)
~[org.eclipse.jetty-jetty-server-9.4.43.v20210629.jar:9.4.43.v20210629]
at
org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
~[org.eclipse.jetty-jetty-server-9.4.43.v20210629.jar:9.4.43.v20210629]
at
org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1349)
~[org.eclipse.jetty-jetty-server-9.4.43.v20210629.jar:9.4.43.v20210629]
at
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
~[org.eclipse.jetty-jetty-server-9.4.43.v20210629.jar:9.4.43.v20210629]
at
org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:234)
~[org.eclipse.jetty-jetty-server-9.4.43.v20210629.jar:9.4.43.v20210629]
at
org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:146)
~[org.eclipse.jetty-jetty-server-9.4.43.v20210629.jar:9.4.43.v20210629]
at
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
~[org.eclipse.jetty-jetty-server-9.4.43.v20210629.jar:9.4.43.v20210629]
at org.eclipse.jetty.server.Server.handle(Server.java:516)
~[org.eclipse.jetty-jetty-server-9.4.43.v20210629.jar:9.4.43.v20210629]
at
org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:388)
~[org.eclipse.jetty-jetty-server-9.4.43.v20210629.jar:9.4.43.v20210629]
at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:633)
[org.eclipse.jetty-jetty-server-9.4.43.v20210629.jar:9.4.43.v20210629]
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:380)
[org.eclipse.jetty-jetty-server-9.4.43.v20210629.jar:9.4.43.v20210629]
at
org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:277)
[org.eclipse.jetty-jetty-server-9.4.43.v20210629.jar:9.4.43.v20210629]
at
org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)
[org.eclipse.jetty-jetty-io-9.4.43.v20210629.jar:9.4.43.v20210629]
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105)
[org.eclipse.jetty-jetty-io-9.4.43.v20210629.jar:9.4.43.v20210629]
at
org.eclipse.jetty.io.ssl.SslConnection$DecryptedEndPoint.onFillable(SslConnection.java:555)
[org.eclipse.jetty-jetty-io-9.4.43.v20210629.jar:9.4.43.v20210629]
at
org.eclipse.jetty.io.ssl.SslConnection.onFillable(SslConnection.java:410)
[org.eclipse.jetty-jetty-io-9.4.43.v20210629.jar:9.4.43.v20210629]
at
org.eclipse.jetty.io.ssl.SslConnection$2.succeeded(SslConnection.java:164)
[org.eclipse.jetty-jetty-io-9.4.43.v20210629.jar:9.4.43.v20210629]
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105)
[org.eclipse.jetty-jetty-io-9.4.43.v20210629.jar:9.4.43.v20210629]
at org.eclipse.jetty.io.ChannelEndPoint$1.run(ChannelEndPoint.java:104)
[org.eclipse.jetty-jetty-io-9.4.43.v20210629.jar:9.4.43.v20210629]
at
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:338)
[org.eclipse.jetty-jetty-util-9.4.43.v20210629.jar:9.4.43.v20210629]
at
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:315)
[org.eclipse.jetty-jetty-util-9.4.43.v20210629.jar:9.4.43.v20210629]
at
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:173)
[org.eclipse.jetty-jetty-util-9.4.43.v20210629.jar:9.4.43.v20210629]
at
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:131)
[org.eclipse.jetty-jetty-util-9.4.43.v20210629.jar:9.4.43.v20210629]
at
org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:386)
[org.eclipse.jetty-jetty-util-9.4.43.v20210629.jar:9.4.43.v20210629]
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
[?:?]
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
[?:?]
at
io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
[io.netty-netty-common-4.1.72.Final.jar:4.1.72.Final]
at java.lang.Thread.run(Thread.java:829) [?:?]
```
### Modifications
- Convert it based on type judgment.
### Verifying this change
- [x] Make sure that the change passes the CI checks.
### Documentation
Check the box below or label this PR directly (if you have committer
privilege).
Need to update docs?
- [x] `no-need-doc`
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