check file exist before moving (aws#364)

* check file exist before moving when closing the file.

Author: Vikas-kum

smdebug/core/access_layer/file.py

@@ -50,6 +50,11 @@ def close(self):
         """Close the file and move it from /tmp to a permanent directory."""
         self._accessor.close()
         if self.mode in WRITE_MODES:
+            if not os.path.exists(self.temp_path):
+                self.logger.info(
+                    f"Sagemaker-Debugger: Skipping close of file:{self.temp_path} as file doesn't exist"
+                )
+                return
             shutil.move(self.temp_path, self.path)
             self.logger.debug(
                 f"Sagemaker-Debugger: Wrote {os.path.getsize(self.path)} bytes to file {self.path}"