Hi, Probably https://issues.apache.org/jira/browse/DERBY-4701. You could vote to get it fixed.
Thanks, Dag On 10.04.2013 03:38, Al Eridani wrote: > > At the start of our application, we use a call to > NetworkServerControl.ping() to verify that Derby is up. > > We expect an exception to be thrown if the ping call fails and we try > 40 times every half second before giving up. > > It has reported to me that when port 1527 is blocked by packet > filters, that call never returns or it takes a long time, maybe. > > Is there something I can do to get ping to return normally or throw an > exception quickly? > > We are using Derby 10.9.1.0 with the following non-default configuration > > datasource.className=org.apache.derby.jdbc.ClientDataSource > datasource.createDatabase=create > datasource.databaseName=/some/directory > datasource.portNumber=1527 > datasource.serverName=some.server.name <http://some.server.name> > datasource.user=someuser > > The basic code is > > ClientDataSource cds = (ClientDataSource) dataSource; > String serverName = cds.getServerName(); > int serverPort = cds.getPortNumber(); > > InetAddress inetAddr = InetAddress.getByName(serverName); > networkServerControl = new NetworkServerControl(inetAddr, serverPort); > networkServerControl.start(null); > > for (int i = 0; i < 40; i++) { > try { > networkServerControl.ping(); > } catch (Exception e) { > try { > // Sleep for 1/2 second. > } catch (InterruptedException ie) { > break; > } > } > } >
