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Output JDBC java.sql.SQLSyntaxErrorException: ORA-00900: invalid SQL statement

A clear version of Java. at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:450) at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:399) at oracle ...
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T4CConnection@55088667 marked as broken because of SQLSTATE(08006), ErrorCode(17002) java.sql.SQLRecoverableException: IO Error: Connection timed out

I use hikaridatasource and ojdbc10 to connect and query my spring jpa queries.Sometimes we face this issue.And after restart our application it fixed.Do you have any comments 15:14:20.952 ...