java - Linux环境下使用Java中的Runtime.getRuntime().exec执行命令时出现内存泄漏问题

Question

我正在使用以下代码从 Java 运行 Linux 命令，但出现内存泄漏错误。 PFA 错误和代码。如果您已经遇到过这个问题，请给我一些解决方案。

at java.lang.ProcessBuilder.start(ProcessBuilder.java:1042)
        at java.lang.Runtime.exec(Runtime.java:615)
        at java.lang.Runtime.exec(Runtime.java:448)
        at java.lang.Runtime.exec(Runtime.java:345)
        at com.comcast.xarc.services.XarcHomeService.executeCommandLine(XarcHomeService.java:160)
        at com.comcast.xarc.struts.action.XarcHomeAction.execute(XarcHomeAction.java:1095)
        at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:421)
        at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:226)
        at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1164)
        at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:415)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
        at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:722)
Caused by: java.io.IOException: error=2, No such file or directory
        at java.lang.UNIXProcess.forkAndExec(Native Method)
        at java.lang.UNIXProcess.<init>(UNIXProcess.java:135)
        at java.lang.ProcessImpl.start(ProcessImpl.java:130)
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:1023)
        ... 27 more
May 05, 2015 3:17:12 AM org.apache.coyote.AbstractProtocol pause
INFO: Pausing ProtocolHandler ["http-bio-8080"]
May 05, 2015 3:17:12 AM org.apache.coyote.AbstractProtocol pause
INFO: Pausing ProtocolHandler ["ajp-bio-8009"]
May 05, 2015 3:17:12 AM org.apache.catalina.core.StandardService stopInternal
INFO: Stopping service Catalina
log4j: setFile called: C:/2015-05-05/2015-05-05.log, false
log4j: setFile ended
log4j: setFile called: C:/2015-05-05/2015-05-05.log, false
log4j: setFile ended
May 05, 2015 3:17:14 AM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
SEVERE: The web application is still processing a request that has yet to finish. This is very likely to create a memory leak. You can control the time allowed for requests to finish by using the unloadDelay attribute of the standard Context implementation.
May 05, 2015 3:17:14 AM org.apache.coyote.AbstractProtocol stop
INFO: Stopping ProtocolHandler ["http-bio-8080"]    

<小时/>

 try {

    // run the Unix "ps -ef" command
        // using the Runtime exec method:
        Process p = Runtime.getRuntime().exec("cd run;./run.sh");

        BufferedReader stdInput = new BufferedReader(new
             InputStreamReader(p.getInputStream()));

        BufferedReader stdError = new BufferedReader(new
             InputStreamReader(p.getErrorStream()));

        // read the output from the command
        System.out.println("Here is the standard output of the command:\n");
        while ((s = stdInput.readLine()) != null) {
            System.out.println(s);
        }

        // read any errors from the attempted command
        System.out.println("Here is the standard error of the command (if any):\n");
        while ((s = stdError.readLine()) != null) {
            System.out.println(s);
        }

        System.exit(0);
    }
    catch (IOException e) {
        System.out.println("exception happened - here's what I know: ");
        e.printStackTrace();
        System.exit(-1);
    }

Answer 1

问题的根本原因是

Caused by: java.io.IOException: error=2, No such file or directory
    at java.lang.UNIXProcess.forkAndExec(Native Method)
    at java.lang.UNIXProcess.<init>(UNIXProcess.java:135)
    at java.lang.ProcessImpl.start(ProcessImpl.java:130)
    at java.lang.ProcessBuilder.start(ProcessBuilder.java:1023)

该问题是由于您尝试运行的脚本命令导致的，它正在查找无效的目录，并且您收到 IOException 不存在这样的文件或目录。确保您提供了正确的路径并尝试再次启动 apache