diff --git a/azkaban-common/src/main/java/azkaban/executor/ExecutableNode.java b/azkaban-common/src/main/java/azkaban/executor/ExecutableNode.java
index 6887373..d67c351 100644
--- a/azkaban-common/src/main/java/azkaban/executor/ExecutableNode.java
+++ b/azkaban-common/src/main/java/azkaban/executor/ExecutableNode.java
@@ -294,7 +294,9 @@ public class ExecutableNode {
objMap.put(UPDATETIME_PARAM, this.updateTime);
objMap.put(TYPE_PARAM, this.type);
objMap.put(CONDITION_PARAM, this.condition);
- objMap.put(CONDITION_ON_JOB_STATUS_PARAM, this.conditionOnJobStatus.toString());
+ if (this.conditionOnJobStatus != null) {
+ objMap.put(CONDITION_ON_JOB_STATUS_PARAM, this.conditionOnJobStatus.toString());
+ }
objMap.put(ATTEMPT_PARAM, this.attempt);
if (this.inNodes != null && !this.inNodes.isEmpty()) {
