Spark Worker error

gistfile1.txt

Spark Executor Command: "/usr/lib/jvm/java-11-openjdk/bin/java" "-cp" "/opt/spark3/conf/:/opt/spark3/jars/*" "-Xmx1024M" "-Dspark.driver.port=35601" "org.apache.spark.executor.CoarseGrainedExecutorBackend" "--driver-url" "spark://CoarseGrainedScheduler@192.168.11.2:35601" "--executor-id" "0" "--hostname" "192.168.11.2" "--cores" "1" "--app-id" "app-20210816011025-0000" "--worker-url" "spark://Worker@192.168.11.2:39677"
========================================

Using Spark's default log4j profile: org/apache/spark/log4j-defaults.properties
21/08/16 01:10:26 INFO CoarseGrainedExecutorBackend: Started daemon with process name: 134769@laptop-archlinux
21/08/16 01:10:26 INFO SignalUtils: Registering signal handler for TERM
21/08/16 01:10:26 INFO SignalUtils: Registering signal handler for HUP
21/08/16 01:10:26 INFO SignalUtils: Registering signal handler for INT
21/08/16 01:10:26 WARN Utils: Your hostname, laptop-archlinux resolves to a loopback address: 127.0.0.1; using 192.168.11.2 instead (on interface enp0s20f0u1)
21/08/16 01:10:26 WARN Utils: Set SPARK_LOCAL_IP if you need to bind to another address
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.apache.spark.unsafe.Platform (file:/opt/spark3/jars/spark-unsafe_2.12-3.1.2.jar) to constructor java.nio.DirectByteBuffer(long,int)
WARNING: Please consider reporting this to the maintainers of org.apache.spark.unsafe.Platform
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
21/08/16 01:10:26 WARN NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
21/08/16 01:10:26 INFO SecurityManager: Changing view acls to: ywatanabe,root
21/08/16 01:10:26 INFO SecurityManager: Changing modify acls to: ywatanabe,root
21/08/16 01:10:26 INFO SecurityManager: Changing view acls groups to: 
21/08/16 01:10:26 INFO SecurityManager: Changing modify acls groups to: 
21/08/16 01:10:26 INFO SecurityManager: SecurityManager: authentication disabled; ui acls disabled; users  with view permissions: Set(ywatanabe, root); groups with view permissions: Set(); users  with modify permissions: Set(ywatanabe, root); groups with modify permissions: Set()
21/08/16 01:10:26 INFO TransportClientFactory: Successfully created connection to /192.168.11.2:35601 after 55 ms (0 ms spent in bootstraps)
21/08/16 01:10:26 WARN TransportChannelHandler: Exception in connection from /192.168.11.2:35601
java.io.InvalidClassException: scala.collection.mutable.WrappedArray$ofRef; local class incompatible: stream classdesc serialVersionUID = 3456489343829468865, local class serialVersionUID = 1028182004549731694
	at java.base/java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:689)
	at java.base/java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:2012)
	at java.base/java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1862)
	at java.base/java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2169)
	at java.base/java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1679)
	at java.base/java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:2464)
	at java.base/java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2358)
	at java.base/java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2196)
	at java.base/java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1679)
	at java.base/java.io.ObjectInputStream.readObject(ObjectInputStream.java:493)
	at java.base/java.io.ObjectInputStream.readObject(ObjectInputStream.java:451)
	at org.apache.spark.serializer.JavaDeserializationStream.readObject(JavaSerializer.scala:76)
	at org.apache.spark.serializer.JavaSerializerInstance.deserialize(JavaSerializer.scala:109)
	at org.apache.spark.rpc.netty.NettyRpcEnv.$anonfun$deserialize$2(NettyRpcEnv.scala:299)
	at scala.util.DynamicVariable.withValue(DynamicVariable.scala:62)
	at org.apache.spark.rpc.netty.NettyRpcEnv.deserialize(NettyRpcEnv.scala:352)
	at org.apache.spark.rpc.netty.NettyRpcEnv.$anonfun$deserialize$1(NettyRpcEnv.scala:298)
	at scala.util.DynamicVariable.withValue(DynamicVariable.scala:62)
	at org.apache.spark.rpc.netty.NettyRpcEnv.deserialize(NettyRpcEnv.scala:298)
	at org.apache.spark.rpc.netty.NettyRpcEnv.$anonfun$askAbortable$7(NettyRpcEnv.scala:246)
	at org.apache.spark.rpc.netty.NettyRpcEnv.$anonfun$askAbortable$7$adapted(NettyRpcEnv.scala:246)
	at org.apache.spark.rpc.netty.RpcOutboxMessage.onSuccess(Outbox.scala:90)
	at org.apache.spark.network.client.TransportResponseHandler.handle(TransportResponseHandler.java:195)
	at org.apache.spark.network.server.TransportChannelHandler.channelRead0(TransportChannelHandler.java:142)
	at org.apache.spark.network.server.TransportChannelHandler.channelRead0(TransportChannelHandler.java:53)
	at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:99)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
	at io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:286)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
	at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
	at org.apache.spark.network.util.TransportFrameDecoder.channelRead(TransportFrameDecoder.java:102)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
	at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
	at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
	at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163)
	at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:714)
	at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:650)
	at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:576)
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493)
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	at java.base/java.lang.Thread.run(Thread.java:829)

I get the same failure.

scala/bug#5046 seems to be related, but I don't know how Spark triggers it.