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IO Error: Connection reset

 
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Hello. If you have a minute, I have JDBC Oracle connection on Tomcat 9, JDK 11. I am suddenly receiving intermittent IO Error: Connection reset exception. Any ideas would be appreciated. Thank you.
 
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Possible timeout from the database. Keep in mind, that an idle connection can't sleep forever but has to execute at least some heartbeet requests.
 
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Could the daatabse (Oracle) been overloaded with SQL requests by another requester/app somewhere? Would that be enough to lock it up? it just came out of nowhere.
 
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