surahman commented on issue #3769:
URL: 
https://github.com/apache/incubator-heron/issues/3769#issuecomment-1028313605


   Would using 
[RandomStringUtils#random](https://commons.apache.org/proper/commons-lang/apidocs/org/apache/commons/lang3/RandomStringUtils.html)
 with a character count of 11 fix the issue? Or is this a string length related 
issue?
   
   If my math is correct it should generate 26 `uppercase` + 26 `lowercase` + 
10 `digits` permute 11 `count` = 62 p 11 = 390,164,706,723,052,800 potential 
strings. That is more options than `Random#long` provides.


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