2

直接粘贴代码示例：

        Runtime rt = Runtime.getRuntime();
        path = "c:\IBM\WebSphere\AppServer\profiles\STSCDmgrProfile\bin\";
        cmd = path + "wsadmin";
        String cmdString = cmd
                + " -host "
                + host
                + " -port "
                + port
                + " -username "
                + username
                + " -password "
                + password
                + " "
                + "-f" + "c:/IBM/WebSphere/AppServer/profiles/STSCDMgrProfile/temp/mergedScripts.jy"
                + " -lang "
                + lang
                + " -tracefile logs/ssc_wsadmin_trace.txt -appendtrace true";
        _logger.finer(cmdString.replaceAll(" " + password, " <password>"));
        Process proc = rt.exec(cmdString);
        _logger.finer("Launched process");

        stdInput = new BufferedReader(new InputStreamReader(proc
                .getInputStream()));
        stdError = new BufferedReader(new InputStreamReader(proc
                .getErrorStream()));

        // read the output from the command
        String sIn = "";
        **while ((sIn = stdInput.readLine()) != null) {**
            _logger.log(Level.FINE, "runJCommand stin ==>", sIn);
        }

但是，它在从 stdInput 执行 readLine() 时挂起。上面突出显示。以下是我在跟踪日志中看到的内容：

[7/30/13 23:48:04:937 GMT-12:00] 000000a6 ThreadMonitor W   WSVR0605W: Thread "WebContainer : 1" (00000175) has been active for 664085 milliseconds and may be hung.  There is/are 1 thread(s) in total in the server that may be hung.
at java.io.FileInputStream.readBytes(Native Method)
at java.io.FileInputStream.read(FileInputStream.java:223)
at java.io.BufferedInputStream.read1(BufferedInputStream.java:267)
at java.io.BufferedInputStream.read(BufferedInputStream.java:328)
at sun.nio.cs.StreamDecoder$CharsetSD.readBytes(StreamDecoder.java:464)
at sun.nio.cs.StreamDecoder$CharsetSD.implRead(StreamDecoder.java:506)
at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:234)
at java.io.InputStreamReader.read(InputStreamReader.java:188)
at java.io.BufferedReader.fill(BufferedReader.java:147)
at java.io.BufferedReader.readLine(BufferedReader.java:310)
**at java.io.BufferedReader.readLine(BufferedReader.java:373)**
at com.ibm.sametime.console.admin.plugins.wsadmin.SSCWsAdmin.runJCommand(SSCWsAdmin.java:924)

如果我通过命令行手动运行相同的mergedScripts.jy程序（我在上面的 java 代码中调用），那么它会成功执行并在几分钟内完成。但是，通过 Java 代码，它会永远运行。

可能的原因是什么？在上述情况下，STDIN 实际上是什么？

4

2 回答 2

0

I'm not sure exactly what you are coding, but I once wrote something similar to what you are doing in perl. Perhaps you could adapt it to python.

my $line = "cd /usr/websphere/profiles/myProfile/bin;";
$line .= ($user !~ /root/i) ? ' sesudo' : '';
$line .= " ./wsadmin.sh -lang jython ";
$line .= "-f $wasscriptpth ".join(' ', @args);
$line .= " 2>&1";

Then I simply called the command on the shell and piped the output to a file handle...

open(SSHANDLE, "$line |")

Note the "2>&1" This was a really simple way to read the error and standard output in one place. Perhaps you could do something like this in python?

于 2014-07-15T16:36:15.197 回答
0

在您从 InputStream 读取的示例代码中，但根本不是从 ErrorStream 读取的，您的问题可能是 ErrorStream 的缓冲区已满，这导致进程阻塞或死锁。请参阅本文中的“为什么 Runtime.exec() 挂起”部分。本文继续描述如何避免这种情况，但您可以通过使用ProcessBuilder而不是Runtime.exec()然后重定向 ErrorStream 来简化该过程。

ProcessBuilder pb = new ProcessBuilder("wsadmin", "-host", host, "-port", port, "-username", username, ... );
Process proc = pb.redirectErrorStream(true).start();
//Read from the InputStread as you were...

在上述情况下，STDIN 实际上是什么？

proc.getInputStream()将包含从命令行运行该wsadmin命令时会产生的任何输出。

于 2013-08-01T15:45:56.447 回答