[英]Memory leak in netty API
I am new to netty API and I am using netty3.5.2 to develop client and server communication server, but the app always run full GC, I use jmap to dump the memory and use jhat to show which object occupied the memory. 我是netty API的新手,我使用netty3.5.2来开发客户端和服务器通信服务器,但是应用程序总是运行完整的GC,我使用jmap来转储内存并使用jhat来显示哪个对象占用了内存。
And there are 6413363 instances of DefaultChannelFuture
. 并且有6413363个DefaultChannelFuture
实例。 can someone tell which thread create the DefaultChannelFuture
instances and how and when they will be released? 有人可以告诉哪个线程创建DefaultChannelFuture
实例以及它们将如何以及何时发布?
Top 4 instances suspected 怀疑前4个案例
6413363 instances of class org.jboss.netty.channel.DefaultChannelFuture
6413363类org.jboss.netty.channel.DefaultChannelFuture
实例
631971 instances of class org.jboss.netty.util.internal.LinkedTransferQueue$Node
631971类org.jboss.netty.util.internal.LinkedTransferQueue$Node
实例
630934 instances of class org.jboss.netty.buffer.BigEndianHeapChannelBuffer
630934类org.jboss.netty.buffer.BigEndianHeapChannelBuffer
实例
630767 instances of class org.jboss.netty.channel.DownStreamMessageEvent
类org.jboss.netty.channel.DownStreamMessageEvent
630767个实例
You generating messages to fast. 您生成快速消息。 It overload message queue. 它使消息队列过载。
Check nethwork load. 检查工作负荷。
This question is a bit old now so not sure if you have found an answer. 这个问题现在有点老了,所以不确定你是否找到了答案。 I haven't used it but the Netty in Action book describes a leak detector: 我没有使用它,但Netty in Action书中描述了一个检漏仪:
Netty contains a so called
ResourceLeakDetector
which will sample about 1% of buffer allocations to check if there is a leak in your application. Netty包含一个所谓的ResourceLeakDetector
,它将对大约1%的缓冲区分配进行采样,以检查应用程序中是否存在泄漏。 In case of a detected leak you will see a log message similar to the following: 如果检测到泄漏,您将看到类似于以下内容的日志消息:LEAK: ByteBuf.release() was not called before it's garbage-collected. 泄漏:在垃圾收集之前没有调用ByteBuf.release()。 Enable advanced leak reporting to find out where the leak occurred. 启用高级泄漏报告以找出泄漏发生的位置。 To enable advanced leak reporting, specify the JVM option 要启用高级泄漏报告,请指定JVM选项
-Dio.netty.leakDetectionLevel=advanced
or callResourceLeakDetector.setLevel()
-Dio.netty.leakDetectionLevel=advanced
或调用ResourceLeakDetector.setLevel()
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