Please suggest me, how to resolve the following exception on server.
09-Apr-2020 11:31:15.465 SEVERE [http-nio-7070-exec-107] . The connection pool named: |apex|rt| is not correctly configured, due to the following error(s): Exception occurred while getting connection: oracle.ucp.UniversalConnectionPoolException: All connections in the Universal Connection Pool are in use
oracle.dbtools.url.mapping.TargetNotAvailableException: The connection pool named: |apex|rt| is not correctly configured, due to the following error(s): Exception occurred while getting connection: oracle.ucp.UniversalConnectionPoolException: All connections in the Universal Connection Pool are in use
at oracle.dbtools.url.mapping.db.PoolInjector.inject(PoolInjector.java:63)
at oracle.dbtools.url.mapping.db.DatabaseURLMappingBase.addServices(DatabaseURLMappingBase.java:307)
at oracle.dbtools.url.mapping.URLMappingBase.doFilter(URLMappingBase.java:79)
at oracle.dbtools.url.mapping.filter.URLMappingFilter.doFilter(URLMappingFilter.java:130)
at oracle.dbtools.http.filters.HttpFilter.doFilter(HttpFilter.java:47)
at oracle.dbtools.http.filters.FilterChainImpl.doFilter(FilterChainImpl.java:64)
at oracle.dbtools.http.auth.external.ExternalSessionFilter.doFilter(ExternalSessionFilter.java:59)
at oracle.dbtools.http.filters.HttpFilter.doFilter(HttpFilter.java:47)
at oracle.dbtools.http.filters.FilterChainImpl.doFilter(FilterChainImpl.java:64)
at oracle.dbtools.rt.authentication.apex.ApexSessionQueryRewriteFilter.doFilter(ApexSessionQueryRewriteFilter.java:58)
at oracle.dbtools.http.filters.HttpFilter.doFilter(HttpFilter.java:47)
at oracle.dbtools.http.filters.FilterChainImpl.doFilter(FilterChainImpl.java:64)
at oracle.dbtools.http.cors.CORSResponseFilter.doFilter(CORSResponseFilter.java:88)
at oracle.dbtools.http.filters.HttpResponseFilter.doFilter(HttpResponseFilter.java:45)
at oracle.dbtools.http.filters.FilterChainImpl.doFilter(FilterChainImpl.java:64)
at oracle.dbtools.http.filters.AbsoluteLocationFilter.doFilter(AbsoluteLocationFilter.java:65)
at oracle.dbtools.http.filters.HttpResponseFilter.doFilter(HttpResponseFilter.java:45)
at oracle.dbtools.http.filters.FilterChainImpl.doFilter(FilterChainImpl.java:64)
at oracle.dbtools.http.errors.ErrorPageFilter.doFilter(ErrorPageFilter.java:85)
at oracle.dbtools.http.filters.HttpFilter.doFilter(HttpFilter.java:47)
at oracle.dbtools.http.filters.FilterChainImpl.doFilter(FilterChainImpl.java:64)
at oracle.dbtools.http.secure.ForceHttpsFilter.doFilter(ForceHttpsFilter.java:74)
at oracle.dbtools.http.filters.HttpFilter.doFilter(HttpFilter.java:47)
at oracle.dbtools.http.filters.FilterChainImpl.doFilter(FilterChainImpl.java:64)
at oracle.dbtools.http.auth.ForceAuthFilter.doFilter(ForceAuthFilter.java:44)
at oracle.dbtools.http.filters.HttpFilter.doFilter(HttpFilter.java:47)
at oracle.dbtools.http.filters.FilterChainImpl.doFilter(FilterChainImpl.java:64)
at oracle.dbtools.http.filters.Filters.filter(Filters.java:67)
at oracle.dbtools.http.entrypoint.EntryPoint.service(EntryPoint.java:82)
at oracle.dbtools.http.entrypoint.EntryPointServlet.service(EntryPointServlet.java:102)
at oracle.dbtools.entrypoint.WebApplicationRequestEntryPoint.service(WebApplicationRequestEntryPoint.java:50)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:543)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:678)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:609)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:810)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1623)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
Caused by: oracle.dbtools.common.jdbc.ConnectionPoolConfigurationException: The connection pool named: |apex|rt| is not correctly configured, due to the following error(s): Exception occurred while getting connection: oracle.ucp.UniversalConnectionPoolException: All connections in the Universal Connection Pool are in use
at oracle.dbtools.common.jdbc.ConnectionPoolExceptions.from(ConnectionPoolExceptions.java:46)
at oracle.dbtools.common.jdbc.DataSourceConnection.getPooledConnection(DataSourceConnection.java:226)
at oracle.dbtools.common.jdbc.DataSourceConnection.getPooledConnection(DataSourceConnection.java:192)
at oracle.dbtools.common.jdbc.DataSourceConnection.getDefaultConnection(DataSourceConnection.java:145)
at oracle.dbtools.common.jdbc.DataSourceConnection.getConnection(DataSourceConnection.java:59)
at oracle.dbtools.common.pools.DataSourceTargetImpl.getConnection(DataSourceTargetImpl.java:60)
at oracle.dbtools.common.config.db.SchemaConnectionFactoryBase.inject(SchemaConnectionFactoryBase.java:84)
at oracle.dbtools.url.mapping.db.PoolInjector.inject(PoolInjector.java:57)
... 53 more
Caused by: java.sql.SQLException: Exception occurred while getting connection: oracle.ucp.UniversalConnectionPoolException: All connections in the Universal Connection Pool are in use
at oracle.ucp.util.UCPErrorHandler.newSQLException(UCPErrorHandler.java:456)
at oracle.ucp.util.UCPErrorHandler.throwSQLException(UCPErrorHandler.java:133)
at oracle.ucp.jdbc.PoolDataSourceImpl.getConnection(PoolDataSourceImpl.java:2004)
at oracle.ucp.jdbc.PoolDataSourceImpl.access$400(PoolDataSourceImpl.java:201)
at oracle.ucp.jdbc.PoolDataSourceImpl$31.build(PoolDataSourceImpl.java:4279)
at oracle.ucp.jdbc.PoolDataSourceImpl.getConnection(PoolDataSourceImpl.java:1917)
at oracle.dbtools.common.config.db.PoolDataSourceThunk.getConnection(PoolDataSourceThunk.java:116)
at oracle.dbtools.common.config.db.RefreshablePoolDataSource.getConnection(RefreshablePoolDataSource.java:107)
at oracle.dbtools.common.config.db.PoolDataSourceThunk.getConnection(PoolDataSourceThunk.java:116)
at oracle.dbtools.common.config.db.PoolDataSourceThunk.getConnection(PoolDataSourceThunk.java:100)
at oracle.dbtools.common.jdbc.DataSourceConnection.getPooledConnection(DataSourceConnection.java:216)
... 59 more
Caused by: oracle.ucp.UniversalConnectionPoolException: All connections in the Universal Connection Pool are in use
at oracle.ucp.util.UCPErrorHandler.newUniversalConnectionPoolException(UCPErrorHandler.java:336)
at oracle.ucp.util.UCPErrorHandler.throwUniversalConnectionPoolException(UCPErrorHandler.java:59)
at oracle.ucp.util.UCPErrorHandler.throwUniversalConnectionPoolException(UCPErrorHandler.java:106)
at oracle.ucp.common.UniversalConnectionPoolImpl.borrowConnectionWithoutCountingRequests(UniversalConnectionPoolImpl.java:289)
at oracle.ucp.common.UniversalConnectionPoolImpl.borrowConnectionAndValidate(UniversalConnectionPoolImpl.java:153)
at oracle.ucp.common.UniversalConnectionPoolImpl.borrowConnection(UniversalConnectionPoolImpl.java:122)
at oracle.ucp.jdbc.JDBCConnectionPool.borrowConnection(JDBCConnectionPool.java:174)
at oracle.ucp.jdbc.oracle.OracleJDBCConnectionPool.borrowConnection(OracleJDBCConnectionPool.java:613)
at oracle.ucp.jdbc.oracle.OracleConnectionConnectionPool.borrowConnection(OracleConnectionConnectionPool.java:103)
at oracle.ucp.jdbc.PoolDataSourceImpl.getConnection(PoolDataSourceImpl.java:1981)