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From: John H. <jh...@im...> - 2013-05-26 16:22:18
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On Sun, 26 May 2013, Drav Sloan wrote: > urbanmojo wrote: >> I'm working with Squirrel 3.4.0 connecting to Oracle over a shaky VPN >> connection using the Oracle Thin JDBC driver. >> >> I've noticed that even if Squirrel is sitting idle for some time and, during >> that time, I lose connection to the database and then come back and try to >> run a query that it doesn't run and I get something like a "closed >> connection error". (even though I currently do have connectivity when >> attempting to run it). >> >> The only way I see is to close my query window and reconnect to the alias. >> >> Question 1: >> 1. Is this an issue with Squirrel, the driver, or Oracle? > > A thin driver connection is a tcp connection (and therefore stateful) which relies > on a permanent net connection. If this fails then the connection will drop. One important piece of that is: if your IP address changes. If the VPN connection drops, gets restored, and you get assigned the same IP address, the TCP connection *should* recover unless the timeouts have been set fairly short. >> 2. Any way around this? > > You can issue the "reconnect" command Session > Reconnect (quick shortcut of > Crtl-Alt-T), which will save you having to reopen the window. You may or may > have some success with a "keepalive" command. Right click on the Alias and > goto Alias Properties, select the connection tab, enable keep alive and set > some sql to run (select sysdate from dual as an example). However this may > make your connection drop more quickly. -- John Hardin KA7OHZ http://www.impsec.org/~jhardin/ jh...@im... FALaholic #11174 pgpk -a jh...@im... key: 0xB8732E79 -- 2D8C 34F4 6411 F507 136C AF76 D822 E6E6 B873 2E79 ----------------------------------------------------------------------- Maxim XXIX: The enemy of my enemy is my enemy's enemy. No more. No less. ----------------------------------------------------------------------- Tomorrow: Memorial Day - honor those who sacrificed for our liberty |
