From 95bda3100178aca0e662d9afccd1d6771ba1df76 Mon Sep 17 00:00:00 2001
From: psterdale <psterdale@gmail.com>
Date: Wed, 28 Jun 2017 18:46:13 +0530
Subject: [PATCH] sys.cleanup() in PythonInterpreter close() method closing
 thread pool _socket.NIO_GROUP in _socket.py

Recreating NIO_GROUP pool if it is shutdown..
---
 Lib/_socket.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Lib/_socket.py b/Lib/_socket.py
index 463093614..3741cacd6 100644
--- a/Lib/_socket.py
+++ b/Lib/_socket.py
@@ -1550,6 +1550,12 @@ def create_connection(address, timeout=_GLOBAL_DEFAULT_TIMEOUT,
     for the socket to bind as a source address before making the connection.
     An host of '' or port 0 tells the OS to use the default.
     """
+    # Added check to recreate thread pool if it is already shutdown
+    if NIO_GROUP.isShutdown():
+        log.debug("Theard pool is shutdown. Recreating...")
+        global NIO_GROUP
+        NIO_GROUP = NioEventLoopGroup(_NUM_THREADS, DaemonThreadFactory("Jython-Netty-Client-%s"))
+        sys.registerCloser(_shutdown_threadpool)
 
     host, port = address
     err = None