| CPC H04L 67/535 (2022.05) [G06F 9/542 (2013.01); G06F 11/3466 (2013.01); H04L 67/306 (2013.01); H04L 67/53 (2022.05)] | 20 Claims | 

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               1. A method, implemented on a machine having at least one processor, storage, and a communication platform connected to a network for tracking an event associated with a user, the method comprising: 
            receiving, by a first server from a second server of a plurality of sequentially arranged distributed servers, previous tracing information associated with the event and generated by the second server; 
                in response to an abnormality related to the event detected by a troubleshoot controlling engine and a tracing flag turned on by the troubleshoot controlling engine based on the abnormality, receiving, by the first server based on the tracing flag, an instruction for executing a task in one or more applications related to the event associated with the user and for recording tracing information associated with the event based on a tracing level that is determined based on a user profile of the user; and 
                performing, by the first server based on the instruction, the following: 
              generating the tracing information including information about the task, 
                  integrating the tracing information with the previous tracing information to generate integrated tracing information, and 
                  sending, to a third server of the plurality of sequentially arranged distributed servers, the integrated tracing information. 
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