diff --git a/services/syncbase/bridge/cgo/jni.go b/services/syncbase/bridge/cgo/jni.go
index 9cc9098..2aed5e7 100644
--- a/services/syncbase/bridge/cgo/jni.go
+++ b/services/syncbase/bridge/cgo/jni.go
@@ -330,7 +330,9 @@
 	var cSpec C.v23_syncbase_SyncgroupSpec
 	var cErr C.v23_syncbase_VError
 	v23_syncbase_DbJoinSyncgroup(cName, cRemoteSyncbaseName, cExpectedSyncbaseBlessings, cSgId, cMyInfo, &cSpec, &cErr)
-	maybeThrowException(env, &cErr)
+	if maybeThrowException(env, &cErr) {
+		return nil
+	}
 	return cSpec.extractToJava(env)
 }
 
@@ -687,7 +689,9 @@
 	var r C.v23_syncbase_Bytes
 	var cErr C.v23_syncbase_VError
 	v23_syncbase_RowGet(cName, cHandle, &r, &cErr)
-	maybeThrowException(env, &cErr)
+	if maybeThrowException(env, &cErr) {
+		return nil
+	}
 	return r.extractToJava(env)
 }
 
@@ -722,7 +726,9 @@
 	var cBlessing C.v23_syncbase_String
 	var cErr C.v23_syncbase_VError
 	v23_syncbase_AppBlessingFromContext(&cBlessing, &cErr)
-	maybeThrowException(env, &cErr)
+	if maybeThrowException(env, &cErr) {
+		return nil
+	}
 	return cBlessing.extractToJava(env)
 }
 
@@ -731,7 +737,9 @@
 	var cBlessing C.v23_syncbase_String
 	var cErr C.v23_syncbase_VError
 	v23_syncbase_UserBlessingFromContext(&cBlessing, &cErr)
-	maybeThrowException(env, &cErr)
+	if maybeThrowException(env, &cErr) {
+		return nil
+	}
 	return cBlessing.extractToJava(env)
 }