SERVER-21526 use RAII type for WTSessionCache::getSession

WiredTigerSessionCache::getSession() returns unique pointers to
WiredTigerSessions rather than bare pointers. These pointers will automatically
call releaseSession() on scope exit.

ON_BLOCK_EXIT and other cleanup code has been removed.

1 files changed, 1 insertions, 2 deletions

diff --git a/src/mongo/db/storage/wiredtiger/wiredtiger_index.cpp b/src/mongo/db/storage/wiredtiger/wiredtiger_index.cpp
index bd522ebf4bc..4cebed3eb61 100644
--- a/src/mongo/db/storage/wiredtiger/wiredtiger_index.cpp
+++ b/src/mongo/db/storage/wiredtiger/wiredtiger_index.cpp
@@ -441,7 +441,6 @@ public:
 
     ~BulkBuilder() {
         _cursor->close(_cursor);
-        WiredTigerRecoveryUnit::get(_txn)->getSessionCache()->releaseSession(_session);
     }
 
 protected:
@@ -468,7 +467,7 @@ protected:
 
     const Ordering _ordering;
     OperationContext* const _txn;
-    WiredTigerSession* const _session;
+    UniqueWiredTigerSession const _session;
     WT_CURSOR* const _cursor;
 };