### What problem does this PR solve?
Refactored DocumentService.update_progress
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
As title export PYTHONPATH in the shell
### Type of change
- [x] Refactoring
Signed-off-by: yihong0618 <zouzou0208@gmail.com>
### What problem does this PR solve?
The `launch_backend_service.sh` script enters infinite loops for both
the task executors and the backend server. When an error occurs in any
of these processes, the script continuously restarts them without
properly handling termination signals. This behavior causes the script
to even ignore interrupts, leading to persistent error messages and
making it difficult to exit the script gracefully.
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### Explanation of Modifications
1. **Signal Trapping with `trap`:**
- The `trap cleanup SIGINT SIGTERM` line ensures that when a `SIGINT` or
`SIGTERM` signal is received, the cleanup function is invoked.
- The `cleanup` function sets the `STOP` flag to `true`, iterates
through all child process IDs stored in the `PIDS` array, and sends a
`kill` signal to each process to terminate them gracefully.
2. **Retry Limits:**
- Introduced a `MAX_RETRIES` variable to limit the number of restart
attempts for both `task_executor.py` and `ragflow_server.py`
- The loops now check if the retry count has reached the maximum limit.
If so, they invoke the `cleanup` function to terminate all processes and
exit the script.
3. **Process Tracking with `PIDS` Array:**
- After launching each background process (`task_exe` and `run_server`),
their Process IDs (PIDs) are stored in the `PIDS` array.
- This allows the `cleanup` function to terminate all child processes
effectively when needed.
4. **Graceful Shutdown:**
- When the `cleanup` function is called, it iterates over all child PIDs
and sends a termination signal (`kill`) to each, ensuring that all
subprocesses are stopped before the script exits.
5. **Logging Enhancements:**
- Added `echo` statements to provide clearer logs about the state of
each process, including attempts, successes, failures, and retries.
6. **Exit on Successful Completion:**
- If `ragflow_server.py` or a `task_executor.py` process exits with a
success code (0), the loop breaks, preventing unnecessary retries.
Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>
### What problem does this PR solve?
Move the build image and launch from source back to README.
### Type of change
- [x] Documentation Update
---------
Signed-off-by: Jin Hai <haijin.chn@gmail.com>
