subprocessio: instead of raising a Thread error we sent a signal to gunicorn.

This will cause a worker recycle, and not block itself anymore.

vcsserver/subprocessio.py

@@ -23,10 +23,13 b' along with git_http_backend.py Project.'
 If not, see <http://www.gnu.org/licenses/>.
 """
 import os
+import logging
 import subprocess32 as subprocess
 from collections import deque
 from threading import Event, Thread
 
+log = logging.getLogger(__name__)
+
 
 class StreamFeeder(Thread):
     """
@@ -133,8 +136,9 b' class InputStreamChunker(Thread):'
                 keep_reading.clear()
                 keep_reading.wait(timeout_input)
                 if len(t) > chunk_count_max + timeout_input:
-                    raise IOError(
-                        "Timed out while waiting for input from subprocess.")
+                    log.error("Timed out while waiting for input from subprocess.")
+                    os._exit(-1)  # this will cause the worker to recycle itself
+
             t.append(b)
             da.set()
             b = s.read(cs)