These days confluence is very slow and not responding. when we check the log we could find the below errors. please advise what could be the cause for these errors.
1.Servlet.service() for servlet action threw exception java.lang.IllegalStateException
2.Java.sql.SQLException: I/O Error: Connection reset
3.A PooledConnection that has already signalled a Connection error is still in use!
4.java.net.SocketException: Connection reset
5.ERROR [scheduler_Worker1] [officeconnector.index.excel.ExcelXMLTextExtractor] endDocument expected [ 419 ] entries but read [ 423 ]
6.java.io.IOException: Stream 2 attempting to read when no request has been sent
7.java.sql.SQLException: Invalid state, the Connection object is closed.
8.net.sf.hibernate.exception.JDBCConnectionException: Cannot open connection
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