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				@@ -241,6 +241,9 @@ public class TriggerCallbackThread { 
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				         // load and clear file, retry 
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				         for (File callbaclLogFile: callbackLogPath.listFiles()) { 
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				             byte[] callbackParamList_bytes = FileUtil.readFileContent(callbaclLogFile); 
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				+            if(callbackParamList_bytes == null || callbackParamList_bytes.length < 1){ 
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				+                continue; 
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				+            } 
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				             List<HandleCallbackParam> callbackParamList = (List<HandleCallbackParam>) JdkSerializeTool.deserialize(callbackParamList_bytes, List.class); 
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				             callbaclLogFile.delete(); 
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