diff --git a/bitbake/lib/bb/fetch2/__init__.py b/bitbake/lib/bb/fetch2/__init__.py
index 3d53b63..288a1c8 100644
--- a/bitbake/lib/bb/fetch2/__init__.py
+++ b/bitbake/lib/bb/fetch2/__init__.py
@@ -464,7 +464,7 @@
                 for k in replacements:
                     uri_replace_decoded[loc] = uri_replace_decoded[loc].replace(k, replacements[k])
                 #bb.note("%s %s %s" % (regexp, uri_replace_decoded[loc], uri_decoded[loc]))
-                result_decoded[loc] = re.sub(regexp, uri_replace_decoded[loc], uri_decoded[loc])
+                result_decoded[loc] = re.sub(regexp, uri_replace_decoded[loc], uri_decoded[loc], 1)
             if loc == 2:
                 # Handle path manipulations
                 basename = None
@@ -862,7 +862,7 @@
     replacements["BASENAME"] = origud.path.split("/")[-1]
     replacements["MIRRORNAME"] = origud.host.replace(':','.') + origud.path.replace('/', '.').replace('*', '.')
 
-    def adduri(ud, uris, uds):
+    def adduri(ud, uris, uds, mirrors):
         for line in mirrors:
             try:
                 (find, replace) = line
@@ -876,6 +876,12 @@
                 logger.debug(1, "Mirror %s not in the list of trusted networks, skipping" %  (newuri))
                 continue
 
+            # Create a local copy of the mirrors minus the current line
+            # this will prevent us from recursively processing the same line
+            # as well as indirect recursion A -> B -> C -> A
+            localmirrors = list(mirrors)
+            localmirrors.remove(line)
+
             try:
                 newud = FetchData(newuri, ld)
                 newud.setup_localpath(ld)
@@ -885,16 +891,16 @@
                 try:
                     # setup_localpath of file:// urls may fail, we should still see 
                     # if mirrors of the url exist
-                    adduri(newud, uris, uds)
+                    adduri(newud, uris, uds, localmirrors)
                 except UnboundLocalError:
                     pass
                 continue   
             uris.append(newuri)
             uds.append(newud)
 
-            adduri(newud, uris, uds)
+            adduri(newud, uris, uds, localmirrors)
 
-    adduri(origud, uris, uds)
+    adduri(origud, uris, uds, mirrors)
 
     return uris, uds
 
diff --git a/bitbake/lib/bb/fetch2/git.py b/bitbake/lib/bb/fetch2/git.py
index 40658ff..9bd87ad 100644
--- a/bitbake/lib/bb/fetch2/git.py
+++ b/bitbake/lib/bb/fetch2/git.py
@@ -66,6 +66,7 @@
 # with this program; if not, write to the Free Software Foundation, Inc.,
 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
+import errno
 import os
 import re
 import bb
@@ -181,8 +182,6 @@
     def download(self, ud, d):
         """Fetch url"""
 
-        ud.repochanged = not os.path.exists(ud.fullmirror)
-
         # If the checkout doesn't exist and the mirror tarball does, extract it
         if not os.path.exists(ud.clonedir) and os.path.exists(ud.fullmirror):
             bb.utils.mkdirhier(ud.clonedir)
@@ -220,7 +219,11 @@
             runfetchcmd(fetch_cmd, d)
             runfetchcmd("%s prune-packed" % ud.basecmd, d)
             runfetchcmd("%s pack-redundant --all | xargs -r rm" % ud.basecmd, d)
-            ud.repochanged = True
+            try:
+                os.unlink(ud.fullmirror)
+            except OSError as exc:
+                if exc.errno != errno.ENOENT:
+                    raise
         os.chdir(ud.clonedir)
         for name in ud.names:
             if not self._contains_ref(ud, d, name):
@@ -228,7 +231,7 @@
 
     def build_mirror_data(self, ud, d):
         # Generate a mirror tarball if needed
-        if ud.write_tarballs and (ud.repochanged or not os.path.exists(ud.fullmirror)):
+        if ud.write_tarballs and not os.path.exists(ud.fullmirror):
             # it's possible that this symlink points to read-only filesystem with PREMIRROR
             if os.path.islink(ud.fullmirror):
                 os.unlink(ud.fullmirror)
diff --git a/bitbake/lib/bb/fetch2/hg.py b/bitbake/lib/bb/fetch2/hg.py
index d978630..bbb4ed9 100644
--- a/bitbake/lib/bb/fetch2/hg.py
+++ b/bitbake/lib/bb/fetch2/hg.py
@@ -163,8 +163,6 @@
     def download(self, ud, d):
         """Fetch url"""
 
-        ud.repochanged = not os.path.exists(ud.fullmirror)
-
         logger.debug(2, "Fetch: checking for module directory '" + ud.moddir + "'")
 
         # If the checkout doesn't exist and the mirror tarball does, extract it
@@ -189,7 +187,11 @@
                 logger.debug(1, "Running %s", pullcmd)
                 bb.fetch2.check_network_access(d, pullcmd, ud.url)
                 runfetchcmd(pullcmd, d)
-                ud.repochanged = True
+                try:
+                    os.unlink(ud.fullmirror)
+                except OSError as exc:
+                    if exc.errno != errno.ENOENT:
+                        raise
 
         # No source found, clone it.
         if not os.path.exists(ud.moddir):
@@ -238,7 +240,7 @@
 
     def build_mirror_data(self, ud, d):
         # Generate a mirror tarball if needed
-        if ud.write_tarballs == "1" and (ud.repochanged or not os.path.exists(ud.fullmirror)):
+        if ud.write_tarballs == "1" and not os.path.exists(ud.fullmirror):
             # it's possible that this symlink points to read-only filesystem with PREMIRROR
             if os.path.islink(ud.fullmirror):
                 os.unlink(ud.fullmirror)