BufferedReader.readline()挂起

Question

我正试图/usr/bin/perl -e 'for(my $i=0;$i<1000;$i++){print 1x1000;print STDERR 2x1000;}'用我的程序运行(在终端中运行).

ProcessBuilder pb = new ProcessBuilder(go); //go is the command
process = pb.start();
BufferedReader incommandbuf = new BufferedReader(new InputStreamReader(process.getInputStream()),1024*1000);
BufferedReader errcommandbuf = new BufferedReader(new InputStreamReader(process.getErrorStream()),1024*1000);
stdString = "";

while ((line = incommandbuf.readLine()) != null)
{
    stdString += line + "\n";
}
String errorstrtemp = "";
while ((line = errcommandbuf.readLine()) != null)
{
    errorstrtemp += line + "\n";
}

如果我尝试运行它,它会挂起while ((line = incommandbuf.readLine()) != null).如果我将命令更改为,程序将运行/usr/bin/perl -e 'for(my $i=0;$i<64;$i++){print 1x1000;print STDERR 2x1000;}'.如果它达到65或更高它不起作用.起初我以为我只需要改变我的BufferedReaders的大小,但它没有帮助.有什么原因导致这个问题？如果需要,我会提供任何其他信息.谢谢.

Answer 1

您正在一次读取一个流.当另一个流填满缓冲区时,您的进程将停止等待您阅读它.解决方案是读取不同线程中的流或使用ProcessBuilder.redirectErrorStream