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Unable to acquire a Read connection. Safe to retry.
kaushikr735
over 7 years ago
We are facing below issue intermittently
ERROR:An error occurred while evaluating expression: oldValue:extract(toxml(pv!cdtOld),"<"&ac!compareFieldName&">","</"&ac!compareFieldName&">") (Unable to acquire a Read connection. Safe to retry. ) (Data Outputs)
We are not able to get any additional information in logs. Can anyone please tell why this is happening?
Thanks in advance.
OriginalPostID-236570
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Sumeet Khare
over 7 years ago
this issue can be due to following possibilities:
1 - the cdt which you are using for converting it to xml has hugh amount of data and the conversion is failing.
2 - KDB's are heavily loaded when that code is getting executed. This can happen due to parallel activities going.
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sanjays0006
over 7 years ago
Adding to sumeet's comment, check your server performance as well.
We got this error when there is a very high memory usage on Appian server.
Check your server memory once and do the necessary clean up.
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kaushikr735
over 7 years ago
@sumeetk @sanjays Thanks for you reply. We had opened the Appian case and we got reply that
"This happens when application server is unable to communicate with the engines (in this specific case, it seems to be the execution engines).
Reasons for this can vary, but commonly include network or connectivity issues between the servers in a distributed installation, or very high resource utilization (such as high heap, memory, and/or cpu)."
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sushilk17
A Score Level 2
over 7 years ago
@kaushikr735, are you able to find the solution for mention issue ?
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