Bug fixed:

- Shutting down a process while committing a transaction could cause
  ZEO client caches to have invalid data.  This, in turn caused stale
  data to remain in the cache until it was updated.

src/CHANGES.txt

@@ -25,6 +25,10 @@ Bugs Fixed
   invalidation transaction ids matched the cached transaction ids
   should have been ignored.
 
+- Shutting down a process while committing a transaction could cause
+  ZEO client caches to have invalid data.  This, in turn caused stale
+  data to remain in the cache until it was updated.
+
 - Conflict errors didn't invalidate ZEO cache entries.
 
 - On Mac OS X, clients that connected and disconnected quickly could

src/ZEO/ClientStorage.py

@@ -1213,6 +1213,7 @@ class ClientStorage(object):
             if had_blobs:
                 self._check_blob_size(self._blob_data_bytes_loaded)
 
+        self._cache.setLastTid(tid)
         self._tbuf.clear()
 
     def undo(self, trans_id, txn):
@@ -1341,6 +1342,11 @@ class ClientStorage(object):
                 self.finish_verification(pair)
                 return "quick verification"
         elif ltid and ltid != utils.z64:
+
+            # XXX Hm, to have gotten here, the cache is non-empty, but
+            # it has no last tid. This doesn't seem like good situation.
+            # We shouldn't treat it so lightly.
+
             self._cache.setLastTid(ltid)
 
         zope.event.notify(ZEO.interfaces.StaleCache(self))

src/ZEO/cache.py

@@ -673,7 +673,9 @@ class ClientCache(object):
         if ofs is None:
             # 0x10 == invalidate (miss)
             self._trace(0x10, oid, tid)
-            return self.setLastTid(tid)
+            if server_invalidation:
+                self.setLastTid(tid)
+            return
 
         self.f.seek(ofs)
         read = self.f.read
@@ -699,7 +701,8 @@ class ClientCache(object):
             # 0x1C = invalidate (hit, saving non-current)
             self._trace(0x1C, oid, tid)
 
-        return self.setLastTid(tid)
+        if server_invalidation:
+            self.setLastTid(tid)
 
     ##
     # Generates (oid, serial) oairs for all objects in the