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[英]Java ProcessBuilder process.destroy() not killing child processes in winXP
[英]Java processbuilder child processes continue after exit
我正在開發一個自動更新腳本,該腳本應該能夠在守護程序完成后重新啟動它。
我正在嘗試這個:
final ArrayList<String> command = new ArrayList<String>();
String initScriptPath = Config.GetStringWithDefault("init_script", "/etc/init.d/my-daemon");
command.add("/bin/bash");
command.add("-c");
command.add("'" + initScriptPath + " restart'");
StringBuilder sb = new StringBuilder();
for (String c : command) {
sb.append(c).append(" ");
}
Log.write(LogPriority.DEBUG, "Attempting restart with: " + sb.toString());
final ProcessBuilder builder = new ProcessBuilder(command);
builder.start();
// Wait for a couple of seconds
try {
Thread.sleep(5000);
} catch (Exception e) {
}
System.exit(0);
但是System.exit似乎停止了重啟? 它確實停止了,但不會重新開始。
您應該在退出之前等待您的流程完成:
final ProcessBuilder builder = new ProcessBuilder(command);
builder.redirectErrorStream(true);
final Process process = builder.start();
final int processStatus = process.waitFor();
並且您應該使用進程的輸出流,因為如果輸出緩沖區變滿,它可能導致進程阻塞。 不確定這是否適用於您的方案,但在任何情況下都是最佳做法:
String line = null;
final BufferedReader reader =
new InputStreamReader (process.getInputStream());
while((line = reader.readLine()) != null) {
// Ignore line, or do something with it
}
您還可以使用像Apache IOUtils這樣的庫作為最后一部分。
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