linux java.net.bind,False java.net.BindException：已在Jetty上使用的地...

在我的CI服务器上,我有一个需要启动Jetty服务器的测试.

测试如下：

>生成随机端口(在合法TCP端口范围内使用java rand).

>使用Linux的热熔器进行验证以检查未使用的端口

>运行测试

有时,即使在验证端口为空闲后,我也会收到异常：

WARN:oejuc.AbstractLifeCycle:FAILED SelectChannelConnector@0.0.0.0:49277 FAILED: java.net.BindException: Address already in use

java.net.BindException: Address already in use

at sun.nio.ch.Net.bind0(Native Method)

at sun.nio.ch.Net.bind(Net.java:444)

at sun.nio.ch.Net.bind(Net.java:436)

at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:214)

at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)

at org.eclipse.jetty.server.nio.SelectChannelConnector.open(SelectChannelConnector.java:172)

at org.eclipse.jetty.server.AbstractConnector.doStart(AbstractConnector.java:300)

at org.eclipse.jetty.server.nio.SelectChannelConnector.doStart(SelectChannelConnector.java:249)

at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:59)

at org.eclipse.jetty.server.Server.doStart(Server.java:272)

at org.mortbay.jetty.plugin.JettyServer.doStart(JettyServer.java:65)

at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:59)

at org.mortbay.jetty.plugin.AbstractJettyMojo.startJetty(AbstractJettyMojo.java:511)

at org.mortbay.jetty.plugin.AbstractJettyMojo.execute(AbstractJettyMojo.java:364)

at org.mortbay.jetty.plugin.JettyRunWarMojo.execute(JettyRunWarMojo.java:71)

at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)

at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)

at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)

at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)

at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)

at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)

at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)

at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)

at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)

at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)

at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)

at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)

at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:606)

at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)

at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)

at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)

at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)

运行的测试：

?

> RHEL 6.3主机

?> Maven 3.0.4

> jetty-maven-plugin：7.5.4

?> Java 1.7.51

可能是什么原因？

谢谢！