logback resilientoutputstreambase.flush错误

dsf9zpds  于 2021-07-09  发布在  Java
关注(0)|答案(0)|浏览(256)

我有一个基于apachenio的http服务器，日志记录是使用logback完成的。应用程序在centos 8下启动，并在不同的端口上侦听。突然，nio defaultlisteningioreactor中的一个线程被启动或停止，其他拥有nio defaultlisteningioreactor的线程仍然可以继续工作而没有任何问题。这个问题似乎与logback有关，就像在nohup文件中我看到的那样：

Exception in thread "I/O dispatcher 7" Exception in thread "I/O dispatcher 6" Exception in thread "Refresh throttle.cfg" 

    at ch.qos.logback.core.recovery.ResilientOutputStreamBase.flush(ResilientOutputStreamBase.java:82)
    at ch.qos.logback.core.OutputStreamAppender.writeBytes(OutputStreamAppender.java:201)
    at ch.qos.logback.core.OutputStreamAppender.subAppend(OutputStreamAppender.java:231)
    at ch.qos.logback.core.rolling.RollingFileAppender.subAppend(RollingFileAppender.java:235)
    at ch.qos.logback.core.OutputStreamAppender.append(OutputStreamAppender.java:102)
    at ch.qos.logback.core.UnsynchronizedAppenderBase.doAppend(UnsynchronizedAppenderBase.java:84)
    at ch.qos.logback.core.spi.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:51)
    at ch.qos.logback.classic.Logger.appendLoopOnAppenders(Logger.java:270)
    at ch.qos.logback.classic.Logger.callAppenders(Logger.java:257)
    at ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:421)
    at ch.qos.logback.classic.Logger.filterAndLog_0_Or3Plus(Logger.java:383)
    at ch.qos.logback.classic.Logger.debug(Logger.java:482)
    at com.company.xmlgw.server.request.CapturedRequest.clearResourcesAndLogRequest(CapturedRequest.java:556)
    at com.company.xmlgw.server.requesthandlers.LbTestHandler.handle(LbTestHandler.java:50)
    at com.company.xmlgw.server.requesthandlers.LbTestHandler.handle(LbTestHandler.java:28)
    at org.apache.http.nio.protocol.HttpAsyncService.responseReady(HttpAsyncService.java:453)
    at org.apache.http.impl.nio.DefaultNHttpServerConnection.produceOutput(DefaultNHttpServerConnection.java:307)
    at org.apache.http.impl.nio.DefaultHttpServerIODispatch.onOutputReady(DefaultHttpServerIODispatch.java:248)
    at org.apache.http.impl.nio.DefaultHttpServerIODispatch.onOutputReady(DefaultHttpServerIODispatch.java:57)
    at org.apache.http.impl.nio.reactor.AbstractIODispatch.outputReady(AbstractIODispatch.java:145)
    at org.apache.http.impl.nio.reactor.BaseIOReactor.writable(BaseIOReactor.java:187)
    at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(AbstractIOReactor.java:341)
    at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(AbstractIOReactor.java:315)
    at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:276)
    at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:104)
    at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:591)
    at java.lang.Thread.run(Thread.java:748)
java.lang.NoClassDefFoundError: ch/qos/logback/core/status/ErrorStatus
    at ch.qos.logback.core.recovery.ResilientOutputStreamBase.postIOFailure(ResilientOutputStreamBase.java:100)
    at ch.qos.logback.core.recovery.ResilientOutputStreamBase.flush(ResilientOutputStreamBase.java:82)
    at ch.qos.logback.core.OutputStreamAppender.writeBytes(OutputStreamAppender.java:201)
    at ch.qos.logback.core.OutputStreamAppender.subAppend(OutputStreamAppender.java:231)
    at ch.qos.logback.core.rolling.RollingFileAppender.subAppend(RollingFileAppender.java:235)
    at ch.qos.logback.core.OutputStreamAppender.append(OutputStreamAppender.java:102)
    at ch.qos.logback.core.UnsynchronizedAppenderBase.doAppend(UnsynchronizedAppenderBase.java:84)
    at ch.qos.logback.core.spi.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:51)
    at ch.qos.logback.classic.Logger.appendLoopOnAppenders(Logger.java:270)
    at ch.qos.logback.classic.Logger.callAppenders(Logger.java:257)
    at ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:421)
    at ch.qos.logback.classic.Logger.filterAndLog_0_Or3Plus(Logger.java:383)
    at ch.qos.logback.classic.Logger.debug(Logger.java:482)
    at com.company.xmlgw.server.request.CapturedRequest.clearResourcesAndLogRequest(CapturedRequest.java:556)
    at com.company.xmlgw.server.requesthandlers.LbTestHandler.handle(LbTestHandler.java:50)
    at com.company.xmlgw.server.requesthandlers.LbTestHandler.handle(LbTestHandler.java:28)
    at org.apache.http.nio.protocol.HttpAsyncService.responseReady(HttpAsyncService.java:453)
    at org.apache.http.impl.nio.DefaultNHttpServerConnection.produceOutput(DefaultNHttpServerConnection.java:307)
    at org.apache.http.impl.nio.DefaultHttpServerIODispatch.onOutputReady(DefaultHttpServerIODispatch.java:248)
    at org.apache.http.impl.nio.DefaultHttpServerIODispatch.onOutputReady(DefaultHttpServerIODispatch.java:57)
    at org.apache.http.impl.nio.reactor.AbstractIODispatch.outputReady(AbstractIODispatch.java:145)
    at org.apache.http.impl.nio.reactor.BaseIOReactor.writable(BaseIOReactor.java:187)
    at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(AbstractIOReactor.java:341)
    at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(AbstractIOReactor.java:315)
    at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:276)
    at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:104)
    at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:591)
    at java.lang.Thread.run(Thread.java:748)
Exception in thread "Commands thread" java.lang.NoClassDefFoundError: org/apache/http/impl/nio/reactor/ExceptionEvent
    at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor.addExceptionEvent(AbstractMultiworkerIOReactor.java:243)
    at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor.addExceptionEvent(AbstractMultiworkerIOReactor.java:253)
    at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor.execute(AbstractMultiworkerIOReactor.java:373)
    at com.company.xmlgw.server.Server.ServerProxyServer$4.run(ServerProxyServer.java:560)
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.ClassNotFoundException: org.apache.http.impl.nio.reactor.ExceptionEvent
    at java.net.URLClassLoader$1.run(URLClassLoader.java:371)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:363)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
    ... 5 more
Caused by: java.util.zip.ZipException: error reading zip file
    at java.util.zip.ZipFile.read(Native Method)
    at java.util.zip.ZipFile.access$1400(ZipFile.java:60)
    at java.util.zip.ZipFile$ZipFileInputStream.read(ZipFile.java:734)
    at java.util.zip.ZipFile$ZipFileInflaterInputStream.fill(ZipFile.java:434)
    at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:158)
    at sun.misc.Resource.getBytes(Resource.java:124)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:463)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:74)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:369)
    ... 11 more
java.lang.NoClassDefFoundError: ch/qos/logback/core/status/ErrorStatus
    at ch.qos.logback.core.recovery.ResilientOutputStreamBase.postIOFailure(ResilientOutputStreamBase.java:100)
    at ch.qos.logback.core.recovery.ResilientOutputStreamBase.flush(ResilientOutputStreamBase.java:82)
    at ch.qos.logback.core.OutputStreamAppender.writeBytes(OutputStreamAppender.java:201)
    at ch.qos.logback.core.OutputStreamAppender.subAppend(OutputStreamAppender.java:231)
    at ch.qos.logback.core.rolling.RollingFileAppender.subAppend(RollingFileAppender.java:235)
    at ch.qos.logback.core.OutputStreamAppender.append(OutputStreamAppender.java:102)
    at ch.qos.logback.core.UnsynchronizedAppenderBase.doAppend(UnsynchronizedAppenderBase.java:84)
    at ch.qos.logback.core.spi.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:51)
    at ch.qos.logback.classic.Logger.appendLoopOnAppenders(Logger.java:270)
    at ch.qos.logback.classic.Logger.callAppenders(Logger.java:257)
    at ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:421)
    at ch.qos.logback.classic.Logger.filterAndLog_0_Or3Plus(Logger.java:383)
    at ch.qos.logback.classic.Logger.debug(Logger.java:482)
    at com.company.xmlgw.server.request.CapturedRequest.clearResourcesAndLogRequest(CapturedRequest.java:556)
    at com.company.xmlgw.server.requesthandlers.LbTestHandler.handle(LbTestHandler.java:50)
    at com.company.xmlgw.server.requesthandlers.LbTestHandler.handle(LbTestHandler.java:28)
    at org.apache.http.nio.protocol.HttpAsyncService.responseReady(HttpAsyncService.java:453)
    at org.apache.http.impl.nio.DefaultNHttpServerConnection.produceOutput(DefaultNHttpServerConnection.java:307)
    at org.apache.http.impl.nio.DefaultHttpServerIODispatch.onOutputReady(DefaultHttpServerIODispatch.java:248)
    at org.apache.http.impl.nio.DefaultHttpServerIODispatch.onOutputReady(DefaultHttpServerIODispatch.java:57)
    at org.apache.http.impl.nio.reactor.AbstractIODispatch.outputReady(AbstractIODispatch.java:145)
    at org.apache.http.impl.nio.reactor.BaseIOReactor.writable(BaseIOReactor.java:187)
    at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(AbstractIOReactor.java:341)
    at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(AbstractIOReactor.java:315)
    at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:276)
    at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:104)
    at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:591)
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.ClassNotFoundException: ch.qos.logback.core.status.ErrorStatus
    at java.net.URLClassLoader$1.run(URLClassLoader.java:371)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:363)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
    ... 28 more
Caused by: java.util.zip.ZipException: error reading zip file
    at java.util.zip.ZipFile.read(Native Method)
    at java.util.zip.ZipFile.access$1400(ZipFile.java:60)
    at java.util.zip.ZipFile$ZipFileInputStream.read(ZipFile.java:734)
    at java.util.zip.ZipFile$ZipFileInflaterInputStream.fill(ZipFile.java:434)
    at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:158)
    at sun.misc.Resource.getBytes(Resource.java:124)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:463)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:74)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:369)
    ... 34 more
Exception in thread "Refresh db2lb.cfg" java.lang.NoClassDefFoundError: ch/qos/logback/core/status/ErrorStatus
    at ch.qos.logback.core.recovery.ResilientOutputStreamBase.postIOFailure(ResilientOutputStreamBase.java:100)
    at ch.qos.logback.core.recovery.ResilientOutputStreamBase.flush(ResilientOutputStreamBase.java:82)
    at ch.qos.logback.core.OutputStreamAppender.writeBytes(OutputStreamAppender.java:201)
    at ch.qos.logback.core.OutputStreamAppender.subAppend(OutputStreamAppender.java:231)
    at ch.qos.logback.core.rolling.RollingFileAppender.subAppend(RollingFileAppender.java:235)
    at ch.qos.logback.core.OutputStreamAppender.append(OutputStreamAppender.java:102)
    at ch.qos.logback.core.UnsynchronizedAppenderBase.doAppend(UnsynchronizedAppenderBase.java:84)
    at ch.qos.logback.core.spi.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:51)
    at ch.qos.logback.classic.Logger.appendLoopOnAppenders(Logger.java:270)
    at ch.qos.logback.classic.Logger.callAppenders(Logger.java:257)
    at ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:421)
    at ch.qos.logback.classic.Logger.filterAndLog_0_Or3Plus(Logger.java:383)
    at ch.qos.logback.classic.Logger.info(Logger.java:579)
    at com.company.common.CacheManager$3.run(CacheManager.java:305)
    at java.lang.Thread.run(Thread.java:748)
Exception in thread "Refresh company cache" java.lang.NoClassDefFoundError: ch/qos/logback/core/status/ErrorStatus
    at ch.qos.logback.core.recovery.ResilientOutputStreamBase.postIOFailure(ResilientOutputStreamBase.java:100)
    at ch.qos.logback.core.recovery.ResilientOutputStreamBase.flush(ResilientOutputStreamBase.java:82)
    at ch.qos.logback.core.OutputStreamAppender.writeBytes(OutputStreamAppender.java:201)
    at ch.qos.logback.core.OutputStreamAppender.subAppend(OutputStreamAppender.java:231)
    at ch.qos.logback.core.rolling.RollingFileAppender.subAppend(RollingFileAppender.java:235)
    at ch.qos.logback.core.OutputStreamAppender.append(OutputStreamAppender.java:102)
    at ch.qos.logback.core.UnsynchronizedAppenderBase.doAppend(UnsynchronizedAppenderBase.java:84)
    at ch.qos.logback.core.spi.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:51)
    at ch.qos.logback.classic.Logger.appendLoopOnAppenders(Logger.java:270)
    at ch.qos.logback.classic.Logger.callAppenders(Logger.java:257)
    at ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:421)
    at ch.qos.logback.classic.Logger.filterAndLog_0_Or3Plus(Logger.java:383)
    at ch.qos.logback.classic.Logger.info(Logger.java:579)
    at com.company.common.CompanyInfoCacheRunnable.run(CompanyInfoCacheRunnable.java:79)
    at java.lang.Thread.run(Thread.java:748)
Exception in thread "I/O dispatcher 8" java.lang.NoClassDefFoundError: ch/qos/logback/core/status/ErrorStatus
    at ch.qos.logback.core.recovery.ResilientOutputStreamBase.postIOFailure(ResilientOutputStreamBase.java:100)
    at ch.qos.logback.core.recovery.ResilientOutputStreamBase.flush(ResilientOutputStreamBase.java:82)
    at ch.qos.logback.core.OutputStreamAppender.writeBytes(OutputStreamAppender.java:201)
    at ch.qos.logback.core.OutputStreamAppender.subAppend(OutputStreamAppender.java:231)
    at ch.qos.logback.core.rolling.RollingFileAppender.subAppend(RollingFileAppender.java:235)
    at ch.qos.logback.core.OutputStreamAppender.append(OutputStreamAppender.java:102)
    at ch.qos.logback.core.UnsynchronizedAppenderBase.doAppend(UnsynchronizedAppenderBase.java:84)
    at ch.qos.logback.core.spi.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:51)
    at ch.qos.logback.classic.Logger.appendLoopOnAppenders(Logger.java:270)
    at ch.qos.logback.classic.Logger.callAppenders(Logger.java:257)
    at ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:421)
    at ch.qos.logback.classic.Logger.filterAndLog_0_Or3Plus(Logger.java:383)
    at ch.qos.logback.classic.Logger.debug(Logger.java:482)
    at com.company.xmlgw.server.request.CapturedRequest.clearResourcesAndLogRequest(CapturedRequest.java:556)
    at com.company.xmlgw.server.requesthandlers.LbTestHandler.handle(LbTestHandler.java:50)
    at com.company.xmlgw.server.requesthandlers.LbTestHandler.handle(LbTestHandler.java:28)
    at org.apache.http.nio.protocol.HttpAsyncService.responseReady(HttpAsyncService.java:453)
    at org.apache.http.impl.nio.DefaultNHttpServerConnection.produceOutput(DefaultNHttpServerConnection.java:307)
    at org.apache.http.impl.nio.DefaultHttpServerIODispatch.onOutputReady(DefaultHttpServerIODispatch.java:248)
    at org.apache.http.impl.nio.DefaultHttpServerIODispatch.onOutputReady(DefaultHttpServerIODispatch.java:57)
    at org.apache.http.impl.nio.reactor.AbstractIODispatch.outputReady(AbstractIODispatch.java:145)
    at org.apache.http.impl.nio.reactor.BaseIOReactor.writable(BaseIOReactor.java:187)
    at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(AbstractIOReactor.java:341)
    at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(AbstractIOReactor.java:315)
    at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:276)
    at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:104)
    at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:591)
    at java.lang.Thread.run(Thread.java:748)
java.lang.NoClassDefFoundError: ch/qos/logback/core/status/ErrorStatus
    at ch.qos.logback.core.recovery.ResilientOutputStreamBase.postIOFailure(ResilientOutputStreamBase.java:100)
    at ch.qos.logback.core.recovery.ResilientOutputStreamBase.flush(ResilientOutputStreamBase.java:82)
    at ch.qos.logback.core.OutputStreamAppender.writeBytes(OutputStreamAppender.java:201)
    at ch.qos.logback.core.OutputStreamAppender.subAppend(OutputStreamAppender.java:231)
    at ch.qos.logback.core.rolling.RollingFileAppender.subAppend(RollingFileAppender.java:235)
    at ch.qos.logback.core.OutputStreamAppender.append(OutputStreamAppender.java:102)
    at ch.qos.logback.core.UnsynchronizedAppenderBase.doAppend(UnsynchronizedAppenderBase.java:84)
    at ch.qos.logback.core.spi.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:51)
    at ch.qos.logback.classic.Logger.appendLoopOnAppenders(Logger.java:270)
    at ch.qos.logback.classic.Logger.callAppenders(Logger.java:257)
    at ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:421)
    at ch.qos.logback.classic.Logger.filterAndLog_0_Or3Plus(Logger.java:383)
    at ch.qos.logback.classic.Logger.info(Logger.java:579)
    at com.company.common.CacheManager.refreshThrottleCfg(CacheManager.java:292)
    at com.company.common.CacheManager.access$200(CacheManager.java:20)
    at com.company.common.CacheManager$1.run(CacheManager.java:190)
    at java.util.TimerThread.mainLoop(Timer.java:555)
    at java.util.TimerThread.run(Timer.java:505)
java.lang.NoClassDefFoundError: ch/qos/logback/core/status/ErrorStatus
    at ch.qos.logback.core.recovery.ResilientOutputStreamBase.postIOFailure(ResilientOutputStreamBase.java:100)
    at ch.qos.logback.core.recovery.ResilientOutputStreamBase.flush(ResilientOutputStreamBase.java:82)
    at ch.qos.logback.core.OutputStreamAppender.writeBytes(OutputStreamAppender.java:201)
    at ch.qos.logback.core.OutputStreamAppender.subAppend(OutputStreamAppender.java:231)
    at ch.qos.logback.core.rolling.RollingFileAppender.subAppend(RollingFileAppender.java:235)
    at ch.qos.logback.core.OutputStreamAppender.append(OutputStreamAppender.java:102)
    at ch.qos.logback.core.UnsynchronizedAppenderBase.doAppend(UnsynchronizedAppenderBase.java:84)
    at ch.qos.logback.core.spi.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:51)
    at ch.qos.logback.classic.Logger.appendLoopOnAppenders(Logger.java:270)
    at ch.qos.logback.classic.Logger.callAppenders(Logger.java:257)
    at ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:421)
    at ch.qos.logback.classic.Logger.filterAndLog_0_Or3Plus(Logger.java:383)
    at ch.qos.logback.classic.Logger.info(Logger.java:579)
    at com.company.common.CacheManager$2.run(CacheManager.java:251)
    at java.lang.Thread.run(Thread.java:748)

由于logback崩溃，我认为线程也会崩溃，但我没有任何日志可以查看。而且，这是第一次发生这种情况，我无法复制问题。
使用的logback版本是1.2.3

<dependency>
         <groupId>ch.qos.logback</groupId>
         <artifactId>logback-classic</artifactId>
         <version>1.2.3</version>
      </dependency>
      <dependency>
         <groupId>ch.qos.logback</groupId>
         <artifactId>logback-core</artifactId>
         <version>1.2.3</version>
      </dependency>
      <dependency>
         <groupId>org.slf4j</groupId>
         <artifactId>slf4j-api</artifactId>
         <version>1.7.12</version>
      </dependency>    
       <dependency>
         <groupId>org.slf4j</groupId>
         <artifactId>slf4j-simple</artifactId>
         <version>1.6.1</version>
      </dependency>

我使用logback的方式一点也不奇怪：

private Logger requestsLogger = LoggerFactory.getLogger("debug");

requestsLogger.debug(logLine);

其中logline是一个字符串。在这一刻，我不知道为什么logback崩溃了，在互联网上找不到这个问题的任何答案。
我的问题是：为什么我会这样，我如何才能解决/避免这个问题？

Javaniologback

暂无答案！

目前还没有任何答案，快来回答吧！

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