DanielZhou created EAGLE-293:
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             Summary: Size of field "alertContext " is too small in table 
"alertdetail_hadoop" in MySQL
                 Key: EAGLE-293
                 URL: https://issues.apache.org/jira/browse/EAGLE-293
             Project: Eagle
          Issue Type: Bug
         Environment: mysql
            Reporter: DanielZhou


Problem:
When using MySQL as eagle's storage, some alert messages didn't show in UI.

Reason:
In  table "alertdetail_hadoop",  field size of "alertContext" is set as 
varchar(1024), which is too small, it can lead to the failure to save alert 
messages.

Suggestion:
Rearrange the size of these columns based on their usages.
Eg:  It makes more sense if we arrange more storage to  field "description" and 
"alertContext" , because they usually contain much more characters than  
"site", "hostname", "application", "alertSource", "streamId",etc.




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