在使用 netty框架时发现在DEBUG模式下报错，但是不影响正常功能使用。就是看着不爽。解决办法是升级Netty 版本

"C:\Program Files\Java\jdk-11.0.7\bin\java.exe" -agentlib:jdwp=transport=dt_socket,address=127.0.0.1:64102,suspend=y,server=n -javaagent:C:\Users\杨学斯\AppData\Local\JetBrains\IntelliJIdea2020.2\groovyHotSwap\gragent.jar -javaagent:C:\Users\杨学斯\AppData\Local\JetBrains\IntelliJIdea2020.2\captureAgent\debugger-agent.jar -Dfile.encoding=UTF-8 -classpath 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org.springframework\spring-tx\4.3.17.RELEASE\31b31e13fceadb816d1ab15ec226fa351d72b663\spring-tx-4.3.17.RELEASE.jar;D:\software\gradle\gradle-5.6.2-all\gradle-5.6.2\caches\modules-2\files-2.1\org.apache.tomcat\tomcat-juli\8.5.31\603fb6e0ddd216b53a803801561661ae9c294ff\tomcat-juli-8.5.31.jar;D:\software\gradle\gradle-5.6.2-all\gradle-5.6.2\caches\modules-2\files-2.1\com.github.jsqlparser\jsqlparser\1.1\9b895c7443cb5cd8220b885711b2ecd2de041ec6\jsqlparser-1.1.jar;D:\software\gradle\gradle-5.6.2-all\gradle-5.6.2\caches\modules-2\files-2.1\org.mybatis\mybatis-spring\1.3.2\fd9961cd026b1f6998be27c516973dd5366b14ec\mybatis-spring-1.3.2.jar;D:\software\gradle\gradle-5.6.2-all\gradle-5.6.2\caches\modules-2\files-2.1\org.mybatis\mybatis\3.4.6\a77a546f679533837f6c6a75c034b669f3ce6a2f\mybatis-3.4.6.jar;D:\software\gradle\gradle-5.6.2-all\gradle-5.6.2\caches\modules-2\files-2.1\net.minidev\accessors-smart\1.2\c592b500269bfde36096641b01238a8350f8aa31\accessors-smart-1.2.jar;D:\software\gradle\gradle-5.6.2-all\gradle-5.6.2\caches\modules-2\files-2.1\ch.qos.logback\logback-core\1.2.3\864344400c3d4d92dfeb0a305dc87d953677c03c\logback-core-1.2.3.jar;D:\software\gradle\gradle-5.6.2-all\gradle-5.6.2\caches\modules-2\files-2.1\org.apache.logging.log4j\log4j-api\2.10.0\fec5797a55b786184a537abd39c3fa1449d752d6\log4j-api-2.10.0.jar;D:\software\gradle\gradle-5.6.2-all\gradle-5.6.2\caches\modules-2\files-2.1\org.ow2.asm\asm\5.0.4\da08b8cce7bbf903602a25a3a163ae252435795\asm-5.0.4.jar;C:\Program Files\JetBrains\IntelliJ IDEA 2020.2\lib\idea_rt.jar" com.sr.middletier.communication.accessory.elevator.TestElevatorServer
Connected to the target VM, address: '127.0.0.1:64102', transport: 'socket'
13:59:01,388 |-INFO in ch.qos.logback.classic.LoggerContext[middletier] - Could NOT find resource [logback-test.xml]
13:59:01,390 |-INFO in ch.qos.logback.classic.LoggerContext[middletier] - Could NOT find resource [logback.groovy]
13:59:01,392 |-INFO in ch.qos.logback.classic.LoggerContext[middletier] - Found resource [logback.xml] at [file:/D:/git_resour/MIDDLE_TIER/middle_tier_tmp/middle-tier/out/production/resources/logback.xml]
13:59:01,741 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - debug attribute not set
13:59:01,762 |-INFO in ch.qos.logback.classic.joran.action.ContextNameAction - Setting logger context name as [middletier]
13:59:01,763 |-INFO in ch.qos.logback.core.joran.action.TimestampAction - Using current interpretation time, i.e. now, as time reference.
13:59:01,862 |-INFO in ch.qos.logback.core.joran.action.TimestampAction - Adding property to the context with key="TIMESTAMP" and value="2021-03-19" to the LOCAL scope
13:59:01,865 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.ConsoleAppender]
13:59:01,876 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [stdout]
13:59:01,993 |-WARN in ch.qos.logback.core.ConsoleAppender[stdout] - This appender no longer admits a layout as a sub-component, set an encoder instead.
13:59:01,993 |-WARN in ch.qos.logback.core.ConsoleAppender[stdout] - To ensure compatibility, wrapping your layout in LayoutWrappingEncoder.
13:59:01,993 |-WARN in ch.qos.logback.core.ConsoleAppender[stdout] - See also http://logback.qos.ch/codes.html#layoutInsteadOfEncoder for details
13:59:01,995 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.rolling.RollingFileAppender]
13:59:02,012 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [fileLog]
13:59:02,039 |-INFO in c.q.l.core.rolling.SizeAndTimeBasedRollingPolicy@2106000623 - Archive files will be limited to [1 GB] each.
13:59:02,045 |-INFO in c.q.l.core.rolling.SizeAndTimeBasedRollingPolicy@2106000623 - No compression will be used
13:59:02,049 |-INFO in c.q.l.core.rolling.SizeAndTimeBasedRollingPolicy@2106000623 - Will use the pattern target/logs/middletier.%d{yyyy-MM-dd}.%i.log for the active file
13:59:02,055 |-INFO in ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP@13b6aecc - The date pattern is 'yyyy-MM-dd' from file name pattern 'target/logs/middletier.%d{yyyy-MM-dd}.%i.log'.
13:59:02,055 |-INFO in ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP@13b6aecc - Roll-over at midnight.
13:59:02,078 |-INFO in ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP@13b6aecc - Setting initial period to Fri Mar 19 13:59:02 CST 2021
13:59:02,094 |-INFO in c.q.l.core.rolling.SizeAndTimeBasedRollingPolicy@2106000623 - Cleaning on start up
13:59:02,174 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[fileLog] - Active log file name: target/logs/middletier.2021-03-19.0.log
13:59:02,174 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[fileLog] - File property is set to [null]
13:59:02,176 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [fileLog] to Logger[ROOT]
13:59:02,177 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [stdout] to Logger[ROOT]
13:59:02,178 |-INFO in ch.qos.logback.classic.joran.action.LoggerAction - Setting additivity of logger [com.sr.middletier.*] to false
13:59:02,178 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [fileLog] to Logger[com.sr.middletier.*]
13:59:02,178 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [stdout] to Logger[com.sr.middletier.*]
13:59:02,178 |-INFO in ch.qos.logback.classic.joran.action.LoggerAction - Setting level of logger [com.sr.middletier.common.base.interceptor.RequestLogInterceptor] to ERROR
13:59:02,178 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [fileLog] to Logger[com.sr.middletier.common.base.interceptor.RequestLogInterceptor]
13:59:02,179 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [stdout] to Logger[com.sr.middletier.common.base.interceptor.RequestLogInterceptor]
13:59:02,179 |-INFO in ch.qos.logback.classic.joran.action.LoggerAction - Setting level of logger [com.sr.middletier.common.base.config.RestTemplateConfig] to ERROR
13:59:02,179 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [fileLog] to Logger[com.sr.middletier.common.base.config.RestTemplateConfig]
13:59:02,179 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [stdout] to Logger[com.sr.middletier.common.base.config.RestTemplateConfig]
13:59:02,179 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - End of configuration.
13:59:02,180 |-INFO in ch.qos.logback.classic.joran.JoranConfigurator@158a8276 - Registering current configuration as safe fallback point2021-03-19 13:59:02.295 DEBUG --- [main] i.n.u.i.l.InternalLoggerFactory 43 : Using SLF4J as the default logging framework
2021-03-19 13:59:02.316 DEBUG --- [main] i.n.c.MultithreadEventLoopGroup 44 : -Dio.netty.eventLoopThreads: 16
2021-03-19 13:59:02.374 DEBUG --- [main] i.n.u.i.InternalThreadLocalMap 54 : -Dio.netty.threadLocalMap.stringBuilder.initialSize: 1024
2021-03-19 13:59:02.375 DEBUG --- [main] i.n.u.i.InternalThreadLocalMap 57 : -Dio.netty.threadLocalMap.stringBuilder.maxSize: 4096
2021-03-19 13:59:02.392 DEBUG --- [main] io.netty.channel.nio.NioEventLoop 106 : -Dio.netty.noKeySetOptimization: false
2021-03-19 13:59:02.393 DEBUG --- [main] io.netty.channel.nio.NioEventLoop 107 : -Dio.netty.selectorAutoRebuildThreshold: 512
2021-03-19 13:59:02.435 DEBUG --- [main] i.n.util.internal.PlatformDependent 985 : Platform: Windows
2021-03-19 13:59:02.442 DEBUG --- [main] i.n.util.internal.PlatformDependent0 395 : -Dio.netty.noUnsafe: false
2021-03-19 13:59:02.448 DEBUG --- [main] i.n.util.internal.PlatformDependent0 851 : Java version: 11
2021-03-19 13:59:02.454 DEBUG --- [main] i.n.util.internal.PlatformDependent0 120 : sun.misc.Unsafe.theUnsafe: available
2021-03-19 13:59:02.458 DEBUG --- [main] i.n.util.internal.PlatformDependent0 144 : sun.misc.Unsafe.copyMemory: available
2021-03-19 13:59:02.465 DEBUG --- [main] i.n.util.internal.PlatformDependent0 182 : java.nio.Buffer.address: available
2021-03-19 13:59:02.474 DEBUG --- [main] i.n.util.internal.PlatformDependent0 252 : direct buffer constructor: unavailable
java.lang.UnsupportedOperationException: Reflective setAccessible(true) disabledat io.netty.util.internal.ReflectionUtil.trySetAccessible(ReflectionUtil.java:31)at io.netty.util.internal.PlatformDependent0$4.run(PlatformDependent0.java:224)at java.base/java.security.AccessController.doPrivileged(Native Method)at io.netty.util.internal.PlatformDependent0.<clinit>(PlatformDependent0.java:218)at io.netty.util.internal.PlatformDependent.isAndroid(PlatformDependent.java:272)at io.netty.util.internal.PlatformDependent.<clinit>(PlatformDependent.java:92)at io.netty.channel.nio.NioEventLoop.newTaskQueue0(NioEventLoop.java:285)at io.netty.channel.nio.NioEventLoop.newTaskQueue(NioEventLoop.java:156)at io.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:138)at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:138)at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:37)at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:84)at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:58)at io.netty.channel.MultithreadEventLoopGroup.<init>(MultithreadEventLoopGroup.java:52)at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:88)at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:83)at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:64)at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:52)at com.sr.middletier.communication.accessory.elevator.TestElevatorServer.run(TestElevatorServer.java:60)at com.sr.middletier.communication.accessory.elevator.TestElevatorServer.main(TestElevatorServer.java:55)
2021-03-19 13:59:02.487 DEBUG --- [main] i.n.util.internal.PlatformDependent0 313 : java.nio.Bits.unaligned: available, true
2021-03-19 13:59:02.490 DEBUG --- [main] i.n.util.internal.PlatformDependent0 372 : jdk.internal.misc.Unsafe.allocateUninitializedArray(int): unavailable
java.lang.IllegalAccessException: class io.netty.util.internal.PlatformDependent0$6 cannot access class jdk.internal.misc.Unsafe (in module java.base) because module java.base does not export jdk.internal.misc to unnamed module @7770f470at java.base/jdk.internal.reflect.Reflection.newIllegalAccessException(Reflection.java:361)at java.base/java.lang.reflect.AccessibleObject.checkAccess(AccessibleObject.java:591)at java.base/java.lang.reflect.Method.invoke(Method.java:558)at io.netty.util.internal.PlatformDependent0$6.run(PlatformDependent0.java:334)at java.base/java.security.AccessController.doPrivileged(Native Method)at io.netty.util.internal.PlatformDependent0.<clinit>(PlatformDependent0.java:325)at io.netty.util.internal.PlatformDependent.isAndroid(PlatformDependent.java:272)at io.netty.util.internal.PlatformDependent.<clinit>(PlatformDependent.java:92)at io.netty.channel.nio.NioEventLoop.newTaskQueue0(NioEventLoop.java:285)at io.netty.channel.nio.NioEventLoop.newTaskQueue(NioEventLoop.java:156)at io.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:138)at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:138)at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:37)at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:84)at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:58)at io.netty.channel.MultithreadEventLoopGroup.<init>(MultithreadEventLoopGroup.java:52)at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:88)at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:83)at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:64)at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:52)at com.sr.middletier.communication.accessory.elevator.TestElevatorServer.run(TestElevatorServer.java:60)at com.sr.middletier.communication.accessory.elevator.TestElevatorServer.main(TestElevatorServer.java:55)
2021-03-19 13:59:02.491 DEBUG --- [main] i.n.util.internal.PlatformDependent0 385 : java.nio.DirectByteBuffer.<init>(long, int): unavailable
2021-03-19 13:59:02.492 DEBUG --- [main] i.n.util.internal.PlatformDependent 1028 : sun.misc.Unsafe: available
2021-03-19 13:59:02.537 DEBUG --- [main] i.n.util.internal.PlatformDependent 1128 : maxDirectMemory: 5314183168 bytes (maybe)
2021-03-19 13:59:02.538 DEBUG --- [main] i.n.util.internal.PlatformDependent 1147 : -Dio.netty.tmpdir: C:\Users\杨学斯\AppData\Local\Temp (java.io.tmpdir)
2021-03-19 13:59:02.539 DEBUG --- [main] i.n.util.internal.PlatformDependent 1226 : -Dio.netty.bitMode: 64 (sun.arch.data.model)
2021-03-19 13:59:02.543 DEBUG --- [main] i.n.util.internal.PlatformDependent 173 : -Dio.netty.maxDirectMemory: -1 bytes
2021-03-19 13:59:02.544 DEBUG --- [main] i.n.util.internal.PlatformDependent 180 : -Dio.netty.uninitializedArrayAllocationThreshold: -1
2021-03-19 13:59:02.547 DEBUG --- [main] io.netty.util.internal.CleanerJava9 71 : java.nio.ByteBuffer.cleaner(): available
2021-03-19 13:59:02.548 DEBUG --- [main] i.n.util.internal.PlatformDependent 200 : -Dio.netty.noPreferDirect: false
2021-03-19 13:59:02.567 DEBUG --- [main] i.n.util.internal.PlatformDependent 890 : org.jctools-core.MpscChunkedArrayQueue: available
2021-03-19 13:59:03.403 DEBUG --- [main] io.netty.channel.DefaultChannelId 79 : -Dio.netty.processId: 84064 (auto-detected)
2021-03-19 13:59:03.407 DEBUG --- [main] io.netty.util.NetUtil 139 : -Djava.net.preferIPv4Stack: false
2021-03-19 13:59:03.408 DEBUG --- [main] io.netty.util.NetUtil 140 : -Djava.net.preferIPv6Addresses: false
2021-03-19 13:59:03.825 DEBUG --- [main] io.netty.util.NetUtil 224 : Loopback interface: lo (Software Loopback Interface 1, 127.0.0.1)
2021-03-19 13:59:03.827 DEBUG --- [main] io.netty.util.NetUtil 289 : Failed to get SOMAXCONN from sysctl and file \proc\sys\net\core\somaxconn. Default: 200
2021-03-19 13:59:04.503 DEBUG --- [main] io.netty.channel.DefaultChannelId 101 : -Dio.netty.machineId: 00:15:5d:ff:fe:62:b2:d7 (auto-detected)
2021-03-19 13:59:04.536 DEBUG --- [main] io.netty.util.ResourceLeakDetector 129 : -Dio.netty.leakDetection.level: simple
2021-03-19 13:59:04.537 DEBUG --- [main] io.netty.util.ResourceLeakDetector 130 : -Dio.netty.leakDetection.targetRecords: 4
2021-03-19 13:59:04.596 DEBUG --- [main] i.n.buffer.PooledByteBufAllocator 142 : -Dio.netty.allocator.numHeapArenas: 16
2021-03-19 13:59:04.598 DEBUG --- [main] i.n.buffer.PooledByteBufAllocator 143 : -Dio.netty.allocator.numDirectArenas: 16
2021-03-19 13:59:04.600 DEBUG --- [main] i.n.buffer.PooledByteBufAllocator 145 : -Dio.netty.allocator.pageSize: 8192
2021-03-19 13:59:04.601 DEBUG --- [main] i.n.buffer.PooledByteBufAllocator 150 : -Dio.netty.allocator.maxOrder: 11
2021-03-19 13:59:04.601 DEBUG --- [main] i.n.buffer.PooledByteBufAllocator 154 : -Dio.netty.allocator.chunkSize: 16777216
2021-03-19 13:59:04.601 DEBUG --- [main] i.n.buffer.PooledByteBufAllocator 155 : -Dio.netty.allocator.tinyCacheSize: 512
2021-03-19 13:59:04.601 DEBUG --- [main] i.n.buffer.PooledByteBufAllocator 156 : -Dio.netty.allocator.smallCacheSize: 256
2021-03-19 13:59:04.602 DEBUG --- [main] i.n.buffer.PooledByteBufAllocator 157 : -Dio.netty.allocator.normalCacheSize: 64
2021-03-19 13:59:04.602 DEBUG --- [main] i.n.buffer.PooledByteBufAllocator 158 : -Dio.netty.allocator.maxCachedBufferCapacity: 32768
2021-03-19 13:59:04.602 DEBUG --- [main] i.n.buffer.PooledByteBufAllocator 159 : -Dio.netty.allocator.cacheTrimInterval: 8192
2021-03-19 13:59:04.602 DEBUG --- [main] i.n.buffer.PooledByteBufAllocator 160 : -Dio.netty.allocator.cacheTrimIntervalMillis: 0
2021-03-19 13:59:04.603 DEBUG --- [main] i.n.buffer.PooledByteBufAllocator 161 : -Dio.netty.allocator.useCacheForAllThreads: true
2021-03-19 13:59:04.604 DEBUG --- [main] i.n.buffer.PooledByteBufAllocator 162 : -Dio.netty.allocator.maxCachedByteBuffersPerChunk: 1023
2021-03-19 13:59:04.622 DEBUG --- [main] io.netty.buffer.ByteBufUtil 85 : -Dio.netty.allocator.type: pooled
2021-03-19 13:59:04.623 DEBUG --- [main] io.netty.buffer.ByteBufUtil 94 : -Dio.netty.threadLocalDirectBufferSize: 0
2021-03-19 13:59:04.623 DEBUG --- [main] io.netty.buffer.ByteBufUtil 97 : -Dio.netty.maxThreadLocalCharBufferSize: 16384
Disconnected from the target VM, address: '127.0.0.1:64102', transport: 'socket'Process finished with exit code -1

**

解决办法：

**
升级你的netty版本。
之前用的是 ：

implementation group: 'io.netty', name: 'netty-all', version: '4.1.42.Final'

升级这个：

implementation group: 'io.netty', name: 'netty-all', version: '5.0.0.Alpha2'

升级后变化比较大，以前某些API都要修改比较麻烦。当然官方自然有修改不 名称的理由
例如：SimpleChannelInboundHandler 下的 channelRead0 变成了 messageReceived。

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