Troubleshooting "process.waitFor() Never Returns" in Java
When executing system commands using Runtime.getRuntime().exec(), you may encounter situations where the subsequent call to process.waitFor() hangs indefinitely. Here are some common reasons and potential solutions:
Process Output Blocking
A primary cause of this issue is when the executed command produces output and your program fails to read from the appropriate streams. As a result, the command becomes blocked waiting for buffer space, while your program waits for the command to complete. This creates a deadlock situation.
Solution: Continuously read from the command's input stream to prevent blocking. Use methods like BufferedReader.readLine() to consume output from the InputStreamReader connected to the process's input stream.
Other Common Issues
Additional Resources:
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