diff --git a/newbrt/brt-internal.h b/newbrt/brt-internal.h
index ae58936700a..3e57f9377fd 100644
--- a/newbrt/brt-internal.h
+++ b/newbrt/brt-internal.h
@@ -131,6 +131,7 @@ struct brt {
 
     void *skey,*sval; /* Used for DBT return values. */
 
+    OMT txns; // transactions that are using this OMT (note that the transaction checks the cf also)
 };
 
 /* serialization code */
diff --git a/newbrt/brt.c b/newbrt/brt.c
index b513d5b960e..144c897308f 100644
--- a/newbrt/brt.c
+++ b/newbrt/brt.c
@@ -2070,7 +2070,7 @@ error:
 
 // This one has no env
 int toku_open_brt (const char *fname, const char *dbname, int is_create, BRT *newbrt, int nodesize, CACHETABLE cachetable, TOKUTXN txn,
-	      int (*compare_fun)(DB*,const DBT*,const DBT*), DB *db) {
+		   int (*compare_fun)(DB*,const DBT*,const DBT*), DB *db) {
     BRT brt;
     int r;
     const int only_create = 0;
diff --git a/newbrt/brt2.c b/newbrt/brt2.c
index 1960421971f..11a24aa1814 100644
--- a/newbrt/brt2.c
+++ b/newbrt/brt2.c
@@ -828,6 +828,8 @@ int toku_brt_create(BRT *brt_ptr) {
     brt->nodesize = BRT_DEFAULT_NODE_SIZE;
     brt->compare_fun = toku_default_compare_fun;
     brt->dup_compare = toku_default_compare_fun;
+    int r = toku_omt_create(&brt->txns);
+    if (r!=0) { toku_free(brt); return r; }
     *brt_ptr = brt;
     return 0;
 }
@@ -1103,6 +1105,7 @@ int toku_open_brt (const char *fname, const char *dbname, int is_create, BRT *ne
 
     r = toku_brt_open(brt, fname, fname, dbname, is_create, only_create, load_flags, cachetable, txn, db);
     if (r != 0) {
+	toku_omt_destroy(&brt->txns);
 	toku_free(brt);
         return r;
     }
@@ -1126,6 +1129,8 @@ int toku_close_brt (BRT brt) {
     if (brt->database_name) toku_free(brt->database_name);
     if (brt->skey) { toku_free(brt->skey); }
     if (brt->sval) { toku_free(brt->sval); }
+    assert(toku_omt_size(brt->txns)==0);
+    toku_omt_destroy(&brt->txns);
     toku_free(brt);
     return 0;
 }
diff --git a/newbrt/log.c b/newbrt/log.c
index 05a71287d10..9d41a0f8834 100644
--- a/newbrt/log.c
+++ b/newbrt/log.c
@@ -362,6 +362,8 @@ static void cleanup_txn (TOKUTXN txn) {
     }
 
     list_remove(&txn->live_txns_link);
+    assert(toku_omt_size(txn->used_open_brtcachefile_pairs)==0);
+    toku_omt_destroy(&txn->used_open_brtcachefile_pairs);
     toku_free(txn);
 
     return;
@@ -467,7 +469,12 @@ int toku_logger_txn_begin (TOKUTXN parent_tokutxn, TOKUTXN *tokutxn, TOKULOGGER
     TAGMALLOC(TOKUTXN, result);
     if (result==0) return errno;
     int r =toku_log_xbegin(logger, &result->first_lsn, 0, parent_tokutxn ? parent_tokutxn->txnid64 : 0);
-    if (r!=0) { toku_logger_panic(logger, r);  return r; }
+    if (r!=0) { toku_logger_panic(logger, r);  toku_free(result); return r; }
+    if ((r=toku_omt_create(&result->used_open_brtcachefile_pairs))!=0) {
+	toku_logger_panic(logger, r);
+	toku_free(result);
+	return r;
+    }
     result->txnid64 = result->first_lsn.lsn;
     result->logger = logger;
     result->parent = parent_tokutxn;