[gnome-continuous-yocto/gnomeostree-3.28-rocko: 4683/8267] bitbake: fetch2: Add NFS Stale file exception handling

[Emmanuele Bassi <ebassi src gnome org>]

commit b14e61d1bd17d2976cc25fc78ccaad1c0659dd50
Author: Khem Raj <raj khem gmail com>
Date:   Wed Feb 8 22:41:50 2017 -0800

    bitbake: fetch2: Add NFS Stale file exception handling
    
    - In some cases the file descriptor
      is held by nfs client and none of os.path.* is catching
      that, it could mean that error is not doled out because
      client has cached the stat info. In this case we are
      out of luck. Needed to catch IOError, which would be
      causing the Stale error.
    
    - In download method, update_stamp is invoked
      md5sum validation which is found to be throwing
      Stale errors.
    - Added error handling to fix the stale errors.
    
    (Bitbake rev: 5a53e7d7b017769a6eb0f0a6335735a1fe51a5ec)
    
    Signed-off-by: Balaji Punnuru <balaji_punnuru cable comcast com>
    Signed-off-by: Khem Raj <raj khem gmail com>
    Signed-off-by: Richard Purdie <richard purdie linuxfoundation org>

 bitbake/lib/bb/fetch2/__init__.py |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)
---
diff --git a/bitbake/lib/bb/fetch2/__init__.py b/bitbake/lib/bb/fetch2/__init__.py
index 8dd276f..70387f5 100644
--- a/bitbake/lib/bb/fetch2/__init__.py
+++ b/bitbake/lib/bb/fetch2/__init__.py
@@ -35,6 +35,7 @@ import operator
 import collections
 import subprocess
 import pickle
+import errno
 import bb.persist_data, bb.utils
 import bb.checksum
 from bb import data
@@ -998,6 +999,12 @@ def try_mirror_url(fetch, origud, ud, ld, check = False):
     except bb.fetch2.NetworkAccess:
         raise
 
+    except IOError as e:
+        if e.errno in [os.errno.ESTALE]:
+            logger.warn("Stale Error Observed %s." % ud.url)
+            return False
+        raise
+
     except bb.fetch2.BBFetchException as e:
         if isinstance(e, ChecksumError):
             logger.warning("Mirror checksum failure for url %s (original url: %s)\nCleaning and trying 
again." % (ud.url, origud.url))
@@ -1646,6 +1653,11 @@ class Fetch(object):
 
                 update_stamp(ud, self.d)
 
+            except IOError as e:
+                if e.errno in [os.errno.ESTALE]:
+                    logger.error("Stale Error Observed %s." % u)
+                    raise ChecksumError("Stale Error Detected")
+
             except BBFetchException as e:
                 if isinstance(e, ChecksumError):
                     logger.error("Checksum failure fetching %s" % u)