!1789 修复hash index回放时未判断返回值引发的core问题

Merge pull request !1789 from 陈栋/hash_bugfix

src/gausskernel/storage/access/hash/hash.cpp

@@ -827,6 +827,9 @@ void hashbucketcleanup(Relation rel, Bucket cur_bucket, Buffer bucket_buf,
                 clear_dead_marking = true;
             }
 
+            if (buf != bucket_buf) {
+                MarkBufferDirty(bucket_buf);
+            }
             MarkBufferDirty(buf);
 
             /* XLOG stuff */
@@ -871,24 +874,21 @@ void hashbucketcleanup(Relation rel, Bucket cur_bucket, Buffer bucket_buf,
 
         /*
          * release the lock on previous page after acquiring the lock on next
-         * page
+         * page, except the primary bucket page
          */
-        if (retain_pin)
-            LockBuffer(buf, BUFFER_LOCK_UNLOCK);
-        else
+        if (!retain_pin)
             _hash_relbuf(rel, buf);
 
         buf = next_buf;
     }
 
     /*
-     * lock the bucket page to clear the garbage flag and squeeze the bucket.
-     * if the current buffer is same as bucket buffer, then we already have
-     * lock on bucket page.
+     * Lock the bucket page to clear the garbage flag and squeeze the bucket.
+     * We already have lock on bucket page in the previous step, so release 
+     * the overflow pages is enough.
      */
     if (buf != bucket_buf) {
         _hash_relbuf(rel, buf);
-        LockBuffer(bucket_buf, BUFFER_LOCK_EXCLUSIVE);
     }
 
     /*

src/gausskernel/storage/access/hash/hash_xlog.cpp

@@ -545,13 +545,11 @@ static void hash_xlog_delete(XLogReaderState *record)
     if (xldata->is_primary_bucket_page) {
         action = XLogReadBufferForRedoExtended(record, 1, RBM_NORMAL, true, &deletebuf);
     } else {
-        /*
-         * we don't care for return value as the purpose of reading bucketbuf
-         * is to ensure a cleanup lock on primary bucket page.
-         */
-        (void) XLogReadBufferForRedoExtended(record, 0, RBM_NORMAL, true, &bucketbuf);
-
-        PageSetLSN(bucketbuf.pageinfo.page, lsn);
+        /* read bucketbuf for a cleanup lock on primary bucket page */
+        if (XLogReadBufferForRedoExtended(record, 0, RBM_NORMAL, true, &bucketbuf) == BLK_NEEDS_REDO) {
+            PageSetLSN(bucketbuf.pageinfo.page, lsn);
+            MarkBufferDirty(bucketbuf.buf);
+        }
 
         action = XLogReadBufferForRedo(record, 1, &deletebuf);
     }

src/gausskernel/storage/access/redo/redo_hash.cpp

@@ -1244,7 +1244,10 @@ static void HashXlogDeleteBlock(XLogBlockHead *blockhead, XLogBlockDataParse *bl
             MakeRedoBufferDirty(bufferinfo);
         }
     } else {
-        PageSetLSN(bufferinfo->pageinfo.page, bufferinfo->lsn);
+        if (action == BLK_NEEDS_REDO) {
+            PageSetLSN(bufferinfo->pageinfo.page, bufferinfo->lsn);
+            MakeRedoBufferDirty(bufferinfo);
+        }
     }
 }