Extended error detection

pymongoexport_csv.py

@@ -86,11 +86,15 @@ def process_data_page(
 
 
 # Launch single process to write to the filesystem
-writer_worker = mp.Process(
-    target=utils.filesystem_writer,
-    args=(task_queue, header, args.host, args.port,
-          args.database, args.pagesize, output_dir, args.recovery))
-writer_worker.start()
+try:
+    writer_worker = mp.Process(
+        target=utils.filesystem_writer,
+        args=(task_queue, header, args.host, args.port,
+              args.database, args.pagesize, output_dir, args.recovery))
+    writer_worker.start()
+except Exception:
+    logger.error("There was a failure in the filesystem writer", exc_info=True)
+    sys.exit(1)
 
 # Launch pool of workers to perform the format conversion
 try:
@@ -101,7 +105,7 @@ except utils.ExceptionAtPage as exc:
     task_queue.put((exc.error_page, "ERROR"))
     sys.exit(1)
 except (Exception, KeyboardInterrupt):
-    logger.error("Error detected")
+    logger.error("Error detected", exc_info=True)
     task_queue.put((-2, "ERROR"))
     sys.exit(1)
 
@@ -110,8 +114,13 @@ task_queue.put((-1, "END"))
 
 if globals.timing:
     time1 = time.time()
-utils.generate_metadata_file(output_dir)
-logger.info("Metadata file created")
+try:
+    utils.generate_metadata_file(output_dir)
+    logger.info("Metadata file created")
+except (Exception, KeyboardInterrupt):
+    logger.error("The collection was converted correctly to CSV, but something"
+                 + " failed when generating the metadata file", exc_info=True)
+    sys.exit(1)
 if globals.timing:
     logger.critical(
         "Time spent generating metadata file: {}s"