在k8s上部署sesson模式的flink集群遇到jobmanager报如下错误，请问这是什么原因造成的？要如何fix?
2021-02-07 08:21:41,873 INFO org.apache.flink.runtime.rpc.akka.AkkaRpcService
[] - Starting RPC endpoint for
org.apache.flink.runtime.dispatcher.StandaloneDispatcher at
akka://flink/user/rpc/dispatcher_1 .
2021-02-07 08:21:43,506 WARN
org.apache.flink.runtime.dispatcher.DispatcherRestEndpoint [] - Unhandled
exception
java.io.IOException: Connection reset by peer
at sun.nio.ch.FileDispatcherImpl.read0(Native Method) ~[?:1.8.0_275]
at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39)
~[?:1.8.0_275]
at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)
~[?:1.8.0_275]
at sun.nio.ch.IOUtil.read(IOUtil.java:192) ~[?:1.8.0_275]
at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:379)
~[?:1.8.0_275]
at
org.apache.flink.shaded.netty4.io.netty.buffer.PooledByteBuf.setBytes(PooledByteBuf.java:253)
~[flink-dist_2.12-1.12.0.jar:1.12.0]
at
org.apache.flink.shaded.netty4.io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:1133)
~[flink-dist_2.12-1.12.0.jar:1.12.0]
at
org.apache.flink.shaded.netty4.io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:350)
~[flink-dist_2.12-1.12.0.jar:1.12.0]
at
org.apache.flink.shaded.netty4.io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:148)
[flink-dist_2.12-1.12.0.jar:1.12.0]
at
org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:714)
[flink-dist_2.12-1.12.0.jar:1.12.0]
at
org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:650)
[flink-dist_2.12-1.12.0.jar:1.12.0]
at
org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:576)
[flink-dist_2.12-1.12.0.jar:1.12.0]
at
org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493)
[flink-dist_2.12-1.12.0.jar:1.12.0]
at
org.apache.flink.shaded.netty4.io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
[flink-dist_2.12-1.12.0.jar:1.12.0]
at
org.apache.flink.shaded.netty4.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
[flink-dist_2.12-1.12.0.jar:1.12.0]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_275]
2021-02-07 08:21:43,940 WARN
org.apache.flink.runtime.dispatcher.DispatcherRestEndpoint [] - Unhandled
exception
java.io.IOException: Connection reset by peer
at sun.nio.ch.FileDispatcherImpl.read0(Native Method) ~[?:1.8.0_275]
at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39)
~[?:1.8.0_275]
at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)
~[?:1.8.0_275]
at sun.nio.ch.IOUtil.read(IOUtil.java:192) ~[?:1.8.0_275]
at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:379)
~[?:1.8.0_275]
at
org.apache.flink.shaded.netty4.io.netty.buffer.PooledByteBuf.setBytes(PooledByteBuf.java:253)
~[flink-dist_2.12-1.12.0.jar:1.12.0]
at
org.apache.flink.shaded.netty4.io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:1133)
~[flink-dist_2.12-1.12.0.jar:1.12.0]
at
org.apache.flink.shaded.netty4.io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:350)
~[flink-dist_2.12-1.12.0.jar:1.12.0]
at
org.apache.flink.shaded.netty4.io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:148)
[flink-dist_2.12-1.12.0.jar:1.12.0]
at
org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:714)
[flink-dist_2.12-1.12.0.jar:1.12.0]
at
org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:650)
[flink-dist_2.12-1.12.0.jar:1.12.0]
at
org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:576)
[flink-dist_2.12-1.12.0.jar:1.12.0]
at
org.apache.flink.shaded.netty4.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493)
[flink-dist_2.12-1.12.0.jar:1.12.0]
at
org.apache.flink.shaded.netty4.io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
[flink-dist_2.12-1.12.0.jar:1.12.0]
at
org.apache.flink.shaded.netty4.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
[flink-dist_2.12-1.12.0.jar:1.12.0]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_275]
