dubbo设置3000个线程，当并发量很高的时候会有多个线程被同一个线程阻塞
log4j日志配置如下
`<appender name="file" class="org.apache.log4j.DailyRollingFileAppender">
<param name="File" value="./logs/log.log" />
<param name="Encoding" value="utf-8" />
<param name="DatePattern" value="'.'yyyy-MM-dd-HH" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern"
value="%d{yyyy-MM-dd HH:mm:ss,SSS} %5p
(%F:%L) - %m%n" />
</layout>
</appender>
<appender name="ASYNCOUT" class="org.apache.log4j.AsyncAppender">
<param name="BufferSize" value="8192" />
<appender-ref ref="file" />
</appender>`
Dubbo_JStack日志：
`"DubboServerHandler-10.200.130.59:20992-thread-2298" Id=2769 BLOCKED on
org.apache.log4j.spi.RootLogger@13344c34 owned by
"DubboServerHandler-10.200.130.59:20992-thread-1433" Id=1900
at org.apache.log4j.Category.callAppenders(Category.java:204)
- blocked on org.apache.log4j.spi.RootLogger@13344c34
at org.apache.log4j.Category.forcedLog(Category.java:391)
at org.apache.log4j.Category.log(Category.java:856)
at org.slf4j.impl.Log4jLoggerAdapter.error(Log4jLoggerAdapter.java:576)
at
com.alibaba.dubbo.common.bytecode.Wrapper5.invokeMethod(Wrapper5.java)
at
com.alibaba.dubbo.rpc.proxy.javassist.JavassistProxyFactory$1.doInvoke(JavassistProxyFactory.java:47)
at
com.alibaba.dubbo.rpc.proxy.AbstractProxyInvoker.invoke(AbstractProxyInvoker.java:76)
at
com.alibaba.dubbo.config.invoker.DelegateProviderMetaDataInvoker.invoke(DelegateProviderMetaDataInvoker.java:52)
at
com.alibaba.dubbo.rpc.protocol.InvokerWrapper.invoke(InvokerWrapper.java:56)
at
com.alibaba.dubbo.rpc.filter.ExceptionFilter.invoke(ExceptionFilter.java:62)
at
com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:72)
at
com.alibaba.dubbo.monitor.support.MonitorFilter.invoke(MonitorFilter.java:75)
at
com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:72)
at
com.alibaba.dubbo.rpc.filter.TimeoutFilter.invoke(TimeoutFilter.java:42)
at
com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:72)
at
com.alibaba.dubbo.rpc.protocol.dubbo.filter.TraceFilter.invoke(TraceFilter.java:78)
at
com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:72)
at
com.alibaba.dubbo.rpc.filter.ContextFilter.invoke(ContextFilter.java:73)
at
com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:72)
at
com.alibaba.dubbo.rpc.filter.GenericFilter.invoke(GenericFilter.java:138)
at
com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:72)
at
com.alibaba.dubbo.rpc.filter.ClassLoaderFilter.invoke(ClassLoaderFilter.java:38)
at
com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:72)
at
com.alibaba.dubbo.rpc.filter.EchoFilter.invoke$sentryProxy(EchoFilter.java:38)
at com.alibaba.dubbo.rpc.filter.EchoFilter.invoke(EchoFilter.java)
at
com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:72)
at
com.alibaba.dubbo.rpc.protocol.dubbo.DubboProtocol$1.reply(DubboProtocol.java:104)
at
com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.handleRequest(HeaderExchangeHandler.java:96)
at
com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.received(HeaderExchangeHandler.java:173)
...
Number of locked synchronizers = 1
- java.util.concurrent.ThreadPoolExecutor$Worker@63508aab
`
[ Full content available at: https://github.com/apache/dubbo/issues/5604 ]
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