Avoid invoking the busy-handler if a blocking lock times out while attempting to open a snapshot transaction.

FossilOrigin-Name: fe11f85fd3283bb7002f43bd8b796e9e7b67f6d1a92eb676be06b46d1458fc1d

1 files changed, 8 insertions, 0 deletions

diff --git a/src/btree.c b/src/btree.c
index 1bd59a1b1..064856635 100644
--- a/src/btree.c
+++ b/src/btree.c
@@ -3697,6 +3697,14 @@ static SQLITE_NOINLINE int btreeBeginTrans(
       (void)sqlite3PagerWalWriteLock(pPager, 0);
       unlockBtreeIfUnused(pBt);
     }
+#if defined(SQLITE_ENABLE_SETLK_TIMEOUT) && defined(SQLITE_ENABLE_SNAPSHOT)
+    if( rc==SQLITE_BUSY_TIMEOUT ){
+      /* If a blocking lock timed out, break out of the loop here so that
+      ** the busy-handler is not invoked. This can only happen when opening
+      ** a transaction on a snapshot. */
+      break;
+    }
+#endif
   }while( (rc&0xFF)==SQLITE_BUSY && pBt->inTransaction==TRANS_NONE &&
           btreeInvokeBusyHandler(pBt) );
   sqlite3PagerWalDb(pPager, 0);