When I use my PC as standalone (not connected to the internet), I disable the firewall program (to save on resources I guess). However, when I run a java app which accesses a database, say MySql, installed in my PC the following error occurs: =================== ... java.sql.SQLException: Connection is broken: Network is down: connect at org.hsqldb.Trace.getError(Unknown Source) at org.hsqldb.Trace.error(Unknown Source) at org.hsqldb.jdbcConnection.reconnectHSQL(Unknown Source) at org.hsqldb.jdbcConnection.openHSQL(Unknown Source) at org.hsqldb.jdbcConnection.<init>(Unknown Source) at org.hsqldb.jdbcDriver.connect(Unknown Source) at java.sql.DriverManager.getConnection(DriverManager.java:512) at java.sql.DriverManager.getConnection(DriverManager.java:171) at HsqldbTest.main(HsqldbTest.java:13) Finished executing ================= I notice that this happens even when a java app accesses other databases e.g. hsqldb in my pc. The error however goes away when I enable the firewall program before running the mentioned java app (it seemed that the firewall configured something in my pc that persists even if the firewall is disabled(?)). Will anyone explain the error? And any suggestion on how to run the app without enabling the firewall in my machine(in case the app is installed in another standalone machine of similar condition)?
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