bk commit into 5.1 tree (jonas:1.2453) BUG#27651

[jonas]

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ChangeSet@stripped, 2007-04-10 10:15:35+02:00, jonas@stripped +1 -0
  ndb - bug#27651 (5.1)
    Only prepare "next" GCI if we're in the first 4 highest GCI's
      to avoid we can get several buckets with same GCI

  storage/ndb/src/ndbapi/NdbEventOperationImpl.cpp@stripped, 2007-04-10 10:15:33+02:00, jonas@stripped +16 -4
    Only prepare "next" GCI if we're in the first 4 highest GCI's
          to avoid we can get several buckets with same GCI

# This is a BitKeeper patch.  What follows are the unified diffs for the
# set of deltas contained in the patch.  The rest of the patch, the part
# that BitKeeper cares about, is below these diffs.
# User:	jonas
# Host:	perch.ndb.mysql.com
# Root:	/home/jonas/src/51-telco-gca

--- 1.77/storage/ndb/src/ndbapi/NdbEventOperationImpl.cpp	2007-04-10 10:15:40 +02:00
+++ 1.78/storage/ndb/src/ndbapi/NdbEventOperationImpl.cpp	2007-04-10 10:15:40 +02:00
@@ -979,7 +979,7 @@
 NdbEventBuffer::NdbEventBuffer(Ndb *ndb) :
   m_system_nodes(ndb->theImpl->theNoOfDBnodes),
   m_ndb(ndb),
-  m_latestGCI(0),
+  m_latestGCI(0), m_latest_complete_GCI(0),
   m_total_alloc(0),
   m_free_thresh(10),
   m_min_free_thresh(10),
@@ -1470,7 +1470,7 @@
                                       , m_flush_gci
 #endif
                                       );
-
+  Uint32 idx = bucket - (Gci_container*)m_active_gci.getBase();
   if (unlikely(bucket == 0))
   {
     /**
@@ -1515,8 +1515,20 @@
       }
       reportStatus();
       bzero(bucket, sizeof(Gci_container));
-      bucket->m_gci = gci + ACTIVE_GCI_DIRECTORY_SIZE;
-      bucket->m_gcp_complete_rep_count = m_system_nodes;
+      if (likely(idx < ACTIVE_GCI_DIRECTORY_SIZE))
+      {
+        /**
+         * Only "prepare" next GCI if we're in
+         *   the first 4 highest GCI's...else
+         *   this is somekind of "late" GCI...
+         *   which is only initialized to 0
+         *
+         *   This to make sure we dont get several buckets with same GCI
+         */
+        bucket->m_gci = gci + ACTIVE_GCI_DIRECTORY_SIZE;
+        bucket->m_gcp_complete_rep_count = m_system_nodes;
+      }
+      
       if(unlikely(m_latest_complete_GCI > gci))
       {
 	complete_outof_order_gcis();