Question

我使用Popen中的subprocess启动命令行工具，该工具为我启动Java Scheduler：

from subprocess import Popen, PIPE, STDOUT
import sys

cmd = "java -Xmx600m -cp target/classes:target/dependency/* com.scheduler.app.main config.properties"
scheduler = Popen(cmd, shell=True, stdin=PIPE, stdout=PIPE,
                  stderr=PIPE, close_fds=True)
if scheduler.pid is not None:
   print("Scheduler started with PID: %s" % scheduler.pid)
   logfile = open('logfile', 'w')
   for line in scheduler.stdout:
        sys.stdout.write(line)
        logfile.write(line)
   scheduler.wait()

我得到的唯一输出是：

Scheduler started with PID: 9169

类似的命令以类似的方式启动。当我这样做时：ps aux | grep java我看到这些进程已经开始了：

psouzamora       9169   0.0  0.0        0      0 s001  Z+    9:26AM   0:00.00 (java)
psouzamora       9170   0.0  0.0        0      0 s001  Z+    9:26AM   0:00.00 (java)
psouzamora       9171   0.0  0.0        0      0 s001  Z+    9:26AM   0:00.00 (java)
psouzamora       9421   0.0  0.0  2445076    804 s017  S+    9:29AM   0:00.00 grep java
psouzamora       9168   0.0  0.0        0      0 s001  Z+    9:26AM   0:00.00 (java)

但是，我没有看到任何输出或生成的日志文件。程序正确结束，没有留下僵尸进程。但是，我没有看到任何输出，也没有生成日志文件。

当我从终端执行相同的命令时，我得到：

2015-11-03 09:34:36.269 ${sys:ipaddr} 9965 [main] DEBUG c.c.u.ConfigHandler - property file = staging.properties
2015-11-03 09:34:36.337 ${sys:ipaddr} 9965 [main] INFO  o.q.i.StdSchedulerFactory - Using default implementation for ThreadExecutor
2015-11-03 09:34:36.343 ${sys:ipaddr} 9965 [main] INFO  o.q.s.SimpleThreadPool - Job execution threads will use class loader of thread: main
2015-11-03 09:34:36.363 ${sys:ipaddr} 9965 [main] INFO  o.q.c.SchedulerSignalerImpl - Initialized Scheduler Signaller of type: class org.quartz.core.SchedulerSignalerImpl
2015-11-03 09:34:36.365 ${sys:ipaddr} 9965 [main] INFO  o.q.c.QuartzScheduler - Quartz Scheduler v.2.2.1 created.
2015-11-03 09:34:36.366 ${sys:ipaddr} 9965 [main] INFO  o.q.s.RAMJobStore - RAMJobStore initialized.
2015-11-03 09:34:36.367 ${sys:ipaddr} 9965 [main] INFO  o.q.c.QuartzScheduler - Scheduler meta-data: Quartz Scheduler (v2.2.1) 'DefaultQuartzScheduler' with instanceId 'NON_CLUSTERED'
  Scheduler class: 'org.quartz.core.QuartzScheduler' - running locally.
  NOT STARTED.
  Currently in standby mode.
  Number of jobs executed: 0
  Using thread pool 'org.quartz.simpl.SimpleThreadPool' - with 10 threads.
  Using job-store 'org.quartz.simpl.RAMJobStore' - which does not support persistence. and is not clustered.

查看我看到的logs目录app-2015-11-03.09-34-36.log应该在那里。我想知道发生了什么。正在执行的命令是正确的。正在启动的java进程应该继续运行，直到它被首先启动该进程的框架杀死。有人能告诉我一些事情吗？我已经添加了一段代码来更新我的问题，以便阅读管道。没有输出任何内容，logfile为空。

启动过程中未生成的日志文件或输出 - Python

0 个答案: