diff --git a/camel-agent/src/main/java/com/dianping/platform/slb/agent/task/processor/AbstractTransactionProcessor.java b/camel-agent/src/main/java/com/dianping/platform/slb/agent/task/processor/AbstractTransactionProcessor.java
index 78df5f8..e6971d6 100644
--- a/camel-agent/src/main/java/com/dianping/platform/slb/agent/task/processor/AbstractTransactionProcessor.java
+++ b/camel-agent/src/main/java/com/dianping/platform/slb/agent/task/processor/AbstractTransactionProcessor.java
@@ -104,7 +104,7 @@ public abstract class AbstractTransactionProcessor implements TransactionProcess
 	public boolean isTransactionProcessing(long transactionId) {
 		Transaction currentTransaction = m_currentTransaction.get();
 
-		if (currentTransaction.getTransactionID() == transactionId) {
+		if ((currentTransaction != null) && (currentTransaction.getTransactionID() == transactionId)) {
 			return true;
 		}
 		return false;