应用错误收集

当我的java应用程序无响应时，我使用jstack -F（如果我运行jstack而没有-F标志，它不会给我任何东西）命令来转储线程信息，转储文件中有一个特殊的线程。

Thread 110175: (state = IN_VM)
 - sun.misc.Unsafe.freeMemory(long) @bci=0 (Compiled frame; information may be imprecise)
 - java.nio.DirectByteBuffer$Deallocator.run() @bci=17, line=94 (Compiled frame)
 - sun.misc.Cleaner.clean() @bci=12, line=143 (Compiled frame)
 - io.netty.util.internal.Cleaner0.freeDirectBuffer(java.nio.ByteBuffer) @bci=34, line=66 (Compiled frame)
 - io.netty.util.internal.PlatformDependent0.freeDirectBuffer(java.nio.ByteBuffer) @bci=1, line=147 (Compiled frame)
 - io.netty.util.internal.PlatformDependent.freeDirectBuffer(java.nio.ByteBuffer) @bci=13, line=281 (Compiled frame)
 - io.netty.buffer.UnpooledUnsafeDirectByteBuf.freeDirect(java.nio.ByteBuffer) @bci=1, line=115 (Compiled frame)
 - io.netty.buffer.UnpooledUnsafeDirectByteBuf.deallocate() @bci=24, line=508 (Compiled frame)
 - io.netty.buffer.AbstractReferenceCountedByteBuf.release() @bci=39, line=106 (Compiled frame)
 - io.netty.util.ReferenceCountUtil.release(java.lang.Object) @bci=11, line=59 (Compiled frame)
 - io.netty.util.ReferenceCountUtil.safeRelease(java.lang.Object) @bci=1, line=84 (Compiled frame)
 - io.netty.channel.ChannelOutboundBuffer.remove() @bci=40, line=258 (Compiled frame)
 - io.netty.channel.ChannelOutboundBuffer.removeBytes(long) @bci=83, line=334 (Compiled frame)
 - io.netty.channel.socket.nio.NioSocketChannel.doWrite(io.netty.channel.ChannelOutboundBuffer) @bci=238, line=301 (Compiled frame)
 - io.netty.channel.AbstractChannel$AbstractUnsafe.flush0() @bci=89, line=716 (Compiled frame)
 - io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.flush0() @bci=9, line=303 (Compiled frame)
 - io.netty.channel.AbstractChannel$AbstractUnsafe.flush() @bci=15, line=685 (Compiled frame)
 - io.netty.channel.DefaultChannelPipeline$HeadContext.flush(io.netty.channel.ChannelHandlerContext) @bci=4, line=1118 (Compiled frame)
 - io.netty.channel.AbstractChannelHandlerContext.invokeFlush() @bci=8, line=663 (Compiled frame)
 - io.netty.channel.AbstractChannelHandlerContext.access$1500(io.netty.channel.AbstractChannelHandlerContext) @bci=1, line=32 (Compiled frame)
 - io.netty.channel.AbstractChannelHandlerContext$16.run() @bci=4, line=651 (Compiled frame)
 - io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(long) @bci=26, line=380 (Compiled frame)
 - io.netty.channel.nio.NioEventLoop.run() @bci=106, line=357 (Compiled frame)
 - io.netty.util.concurrent.SingleThreadEventExecutor$2.run() @bci=13, line=116 (Interpreted frame)
 - java.lang.Thread.run() @bci=11, line=745 (Interpreted frame)

在我使用jstack -F之后，应用程序开始响应并继续进行，就像没有发生任何事情一样，直到它最终再次停止响应。

当应用程序正常时，我使用jstack -F搜索最后一个帖子，它总是IN_NATIVE。

以下是我的问题。

这个帖子可以让我的应用程序无响应吗？
这个帖子是什么？

转储文件中的特殊java线程

2 个答案: