[improve] [broker] Print warn log if ssl handshake error & print ledger id when switch ledger

[poorbarcode]

Motivation

1693900615781 WARN org.apache.pulsar.client.impl.ClientCnx Error during handshake java.nio.channels.ClosedChannelException: null
  at org.apache.pulsar.shade.io.netty.handler.ssl.SslHandler.channelInactive(SslHandler.java:1065)
  at org.apache.pulsar.shade.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:305)
  at org.apache.pulsar.shade.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:281
  at org.apache.pulsar.shade.io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:274) 
  at org.apache.pulsar.shade.io.netty.channel.DefaultChannelPipeline$HeadContext.channelInactive(DefaultChannelPipeline.java:1405)
  at org.apache.pulsar.shade.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:301)
  at org.apache.pulsar.shade.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:281)
  at org.apache.pulsar.shade.io.netty.channel.DefaultChannelPipeline.fireChannelInactive(DefaultChannelPipeline.java:901)
  at org.apache.pulsar.shade.io.netty.channel.AbstractChannel$AbstractUnsafe$7.run(AbstractChannel.java:813)
  at org.apache.pulsar.shade.io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:174)
  at org.apache.pulsar.shade.io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:167)
  at org.apache.pulsar.shade.io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:470)
  at org.apache.pulsar.shade.io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:403)
  at org.apache.pulsar.shade.io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
  at org.apache.pulsar.shade.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
  at org.apache.pulsar.shade.io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
  at java.lang.Thread.run(Thread.java:955)

After SSL handshake fails, it will trigger a user event and close the socket. see https://github.com/netty/netty/blob/4.1/handler/src/main/java/io/netty/handler/ssl/SslUtils.java#L438-L446

    static void handleHandshakeFailure(ChannelHandlerContext ctx, Throwable cause, boolean notify) {
        // We have may haven written some parts of data before an exception was thrown so ensure we always flush.
        // See https://github.com/netty/netty/issues/3900#issuecomment-172481830
        ctx.flush();
        if (notify) {
            ctx.fireUserEventTriggered(new SslHandshakeCompletionEvent(cause));
        }
        ctx.close();
    }

Pulsar ignored this event, so we don't know what happened.

Modifications

• Print a warning log if the SSL handshake error
• Print ledger ID when switching ledger

Documentation

• doc
• doc-required
• doc-not-needed
• doc-complete

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