TeslaCN opened a new issue, #21163:
URL: https://github.com/apache/shardingsphere/issues/21163
## Bug Report
### Which version of ShardingSphere did you use?
c3596089f4bfccd5d2b02b164c203f72e5d779be
### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy?
ShardingSphere-Proxy openGauss
### Expected behavior
gsql client got unknown database error message.
### Actual behavior
gsql client stuck.
```
[ERROR] 2022-09-24 11:19:45.610 [epollEventLoopGroup-3-2]
o.a.s.p.f.n.FrontendChannelInboundHandler - Exception occur:
org.apache.shardingsphere.dialect.exception.syntax.database.UnknownDatabaseException:
null
at
org.apache.shardingsphere.proxy.frontend.opengauss.authentication.OpenGaussAuthenticationHandler.loginWithSCRAMSha256Password(OpenGaussAuthenticationHandler.java:80)
at
org.apache.shardingsphere.proxy.frontend.opengauss.authentication.OpenGaussAuthenticationEngine.processPasswordMessage(OpenGaussAuthenticationEngine.java:115)
at
org.apache.shardingsphere.proxy.frontend.opengauss.authentication.OpenGaussAuthenticationEngine.authenticate(OpenGaussAuthenticationEngine.java:92)
at
org.apache.shardingsphere.proxy.frontend.netty.FrontendChannelInboundHandler.authenticate(FrontendChannelInboundHandler.java:77)
at
org.apache.shardingsphere.proxy.frontend.netty.FrontendChannelInboundHandler.channelRead(FrontendChannelInboundHandler.java:69)
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.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:336)
at
io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:308)
at
io.netty.handler.codec.ByteToMessageCodec.channelRead(ByteToMessageCodec.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
io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at
io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
at
io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:800)
at
io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:499)
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:397)
at
io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
at
io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at
io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.base/java.lang.Thread.run(Thread.java:833)
Exception in thread "ShardingSphere-Command-0"
java.lang.NullPointerException: Cannot invoke "Object.hashCode()" because "key"
is null
at
java.base/java.util.concurrent.ConcurrentHashMap.replaceNode(ConcurrentHashMap.java:1111)
at
java.base/java.util.concurrent.ConcurrentHashMap.remove(ConcurrentHashMap.java:1102)
at
org.apache.shardingsphere.mode.process.ShowProcessListManager.removeProcessStatement(ShowProcessListManager.java:116)
at
org.apache.shardingsphere.mode.process.GovernanceExecuteProcessReporter.reportRemove(GovernanceExecuteProcessReporter.java:78)
at
org.apache.shardingsphere.infra.executor.sql.process.ExecuteProcessEngine.lambda$finishConnection$1(ExecuteProcessEngine.java:73)
at java.base/java.util.Optional.ifPresent(Optional.java:178)
at
org.apache.shardingsphere.infra.executor.sql.process.ExecuteProcessEngine.finishConnection(ExecuteProcessEngine.java:73)
at
org.apache.shardingsphere.proxy.frontend.netty.FrontendChannelInboundHandler.closeAllResources(FrontendChannelInboundHandler.java:108)
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:833)
```
### Steps to reproduce the behavior, such as: SQL to execute, sharding rule
configuration, when exception occur etc.
```
gsql -h 127.0.0.1 -p 55433 -U gaussdb nonexistdb -WPassword
```
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