Re: Does the client hang or disconnect when the server's
Unfortunately, I am not running OPS or RAC. This is a failover-cluster -- if the primary node goes down, the database instance is started on the secondary node. I think Tanel is right that sqlnet.expire_time wouldn't apply. However, Tanel, I didn't understand the paragraph Also, sqlplus is different from normal telnet, because it tries to send a request only when it is on it's prompt, thus issuing a command in sqlplus session, when it is waiting for response from previous command, doesn't send any network packets. Would I be right in understand it to mean that when waiting for a response from the database server, sqlplus doesn't send any network packets. however, if sqlplus is sitting idle and a user enters a command sqlplus attempts to send the request and only then knows that the database or node is down ? So, if my session were sending a fresh request, it would know that the server was unavailable and would return an error [3113 ?] but if it were waiting for a response [last issued an INSERT statement and is waiting for the ACK packet] it would just sit there waiting ? Hemant At 10:04 AM 24-07-03 -0800, you wrote: I agree sqlnet.expire_time does only effect the server, but normally when the server kills the connection the client side will drop. But in this case it won't because there is no network for the client to get the dead connection timeout from the server. It sounds like Hemant is running OPS which AFAIK (version 7.3) he is getting the expected behavior, to get the client to seemlessly switch over to the other instance he needs RAC (again AFAIK). Tanel Poder tanel.poder.003@To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] mail.ee cc: Sent by: Subject: Re: Does the client hang or disconnect when the server's [EMAIL PROTECTED] .com 07/24/2003 12:19 PM Please respond to ORACLE-L Hi! This sqlnet.expire_time affects server, not sqlplus itself AFAIK. The issue is likely, that sqlplus has sent a sqlnet request to server, but hasn't got any response since you pulled the network cable. Thus it'll wait until TCP connection gets timeout. Also, sqlplus is different from normal telnet, because it tries to send a request only when it is on it's prompt, thus issuing a command in sqlplus session, when it is waiting for response from previous command, doesn't send any network packets. Tanel. - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Thursday, July 24, 2003 6:54 PM Hemant, You are right it does get a timeout from the TCP stack, but the default for the connection timeout is 30 minutes. There is a sqlnet parameter where you can modify the timeout to make it shorter (sqlnet.expire_time?) Check metalink note 151972.1 for more info. HTH Mike Hemant K Chitale [EMAIL PROTECTED]To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] .com.sg cc: Sent by: Subject: Does the client hang or disconnect when the server's [EMAIL PROTECTED] .com 07/24/2003 11:24 AM Please respond to ORACLE-L I'm sorry, but I really can't remember how an Oracle SQLPlus client is supposed to behave when the database server's network interface is pulled out. We were testing a new Sun Cluster and tests for Storage FC Path Failure, Instance Failure, Node Failure, HeartBeat failure and single Network Interface failure all went through. However, when the engineer pulled out *both* network interfaces of the running database server node, the SQLPlus client that had been running INSERT statements just hung. It did not exit or error out till we killed the job. At the next restart, of course, it connected to the database which had already failed-over to the second node. The question is : Why does the SQLPlus client hang ? Telnet sessions also might hang [couldnt' test this out as the Servers are Secured and we didn't have SSH on the client], till the user hits the ENTER key, but shouldn't SQLPlus get server disconnect from the TCP stack ? Hemant K Chitale Oracle 9i Database Administrator Certified Professional My personal web site is : http://hkchital.tripod.com -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Hemant K Chitale INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services
Re: Does the client hang or disconnect when the server's
Hi! Actually it seems that as long as the network (TCP) connection is up at OS level, Oracle is just gonna wait for reply for it's packets sent. So, probably no 3113 error before OS drops the TCP connection (if sqlplus or OCI doesn't have some kind of timeout implemented). Sorry about confusion... I tested sending new request with sqlplus, by logging on as system and suspending, not killing my server process (this way OS doesn't clear the TCP connection): SQL select server from v$session where username = 'SYSTEM'; SERVER - DEDICATED SQL select p.spid from v$session s, v$process p where s.paddr = p.addr and s.username = 'SYSTEM'; SPID - 3961 SQL !kill -23 3961 SQL select * from dual; ^C ^C ^C kill -23 means killing with SIGSTOP in Solaris and after that my next request waited indefinetly (at least for 10 minutes after which I continued the process with kill -25). Tanel. - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Friday, July 25, 2003 6:24 PM Unfortunately, I am not running OPS or RAC. This is a failover-cluster -- if the primary node goes down, the database instance is started on the secondary node. I think Tanel is right that sqlnet.expire_time wouldn't apply. However, Tanel, I didn't understand the paragraph Also, sqlplus is different from normal telnet, because it tries to send a request only when it is on it's prompt, thus issuing a command in sqlplus session, when it is waiting for response from previous command, doesn't send any network packets. Would I be right in understand it to mean that when waiting for a response from the database server, sqlplus doesn't send any network packets. however, if sqlplus is sitting idle and a user enters a command sqlplus attempts to send the request and only then knows that the database or node is down ? So, if my session were sending a fresh request, it would know that the server was unavailable and would return an error [3113 ?] but if it were waiting for a response [last issued an INSERT statement and is waiting for the ACK packet] it would just sit there waiting ? Hemant At 10:04 AM 24-07-03 -0800, you wrote: I agree sqlnet.expire_time does only effect the server, but normally when the server kills the connection the client side will drop. But in this case it won't because there is no network for the client to get the dead connection timeout from the server. It sounds like Hemant is running OPS which AFAIK (version 7.3) he is getting the expected behavior, to get the client to seemlessly switch over to the other instance he needs RAC (again AFAIK). Tanel Poder tanel.poder.003@To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] mail.ee cc: Sent by: Subject: Re: Does the client hang or disconnect when the server's [EMAIL PROTECTED] .com 07/24/2003 12:19 PM Please respond to ORACLE-L Hi! This sqlnet.expire_time affects server, not sqlplus itself AFAIK. The issue is likely, that sqlplus has sent a sqlnet request to server, but hasn't got any response since you pulled the network cable. Thus it'll wait until TCP connection gets timeout. Also, sqlplus is different from normal telnet, because it tries to send a request only when it is on it's prompt, thus issuing a command in sqlplus session, when it is waiting for response from previous command, doesn't send any network packets. Tanel. - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Thursday, July 24, 2003 6:54 PM Hemant, You are right it does get a timeout from the TCP stack, but the default for the connection timeout is 30 minutes. There is a sqlnet parameter where you can modify the timeout to make it shorter (sqlnet.expire_time?) Check metalink note 151972.1 for more info. HTH Mike Hemant K Chitale [EMAIL PROTECTED]To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] .com.sg cc: Sent by: Subject: Does the client hang or disconnect when the server's [EMAIL PROTECTED] .com 07/24/2003 11:24 AM Please respond to ORACLE-L I'm sorry, but I really can't remember how an Oracle SQLPlus client is supposed to behave when the database server's network interface is pulled out. We were
Does the client hang or disconnect when the server's
I'm sorry, but I really can't remember how an Oracle SQLPlus client is supposed to behave when the database server's network interface is pulled out. We were testing a new Sun Cluster and tests for Storage FC Path Failure, Instance Failure, Node Failure, HeartBeat failure and single Network Interface failure all went through. However, when the engineer pulled out *both* network interfaces of the running database server node, the SQLPlus client that had been running INSERT statements just hung. It did not exit or error out till we killed the job. At the next restart, of course, it connected to the database which had already failed-over to the second node. The question is : Why does the SQLPlus client hang ? Telnet sessions also might hang [couldnt' test this out as the Servers are Secured and we didn't have SSH on the client], till the user hits the ENTER key, but shouldn't SQLPlus get server disconnect from the TCP stack ? Hemant K Chitale Oracle 9i Database Administrator Certified Professional My personal web site is : http://hkchital.tripod.com -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Hemant K Chitale INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
Re: Does the client hang or disconnect when the server's
Hemant, You are right it does get a timeout from the TCP stack, but the default for the connection timeout is 30 minutes. There is a sqlnet parameter where you can modify the timeout to make it shorter (sqlnet.expire_time?) Check metalink note 151972.1 for more info. HTH Mike Hemant K Chitale [EMAIL PROTECTED]To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] .com.sg cc: Sent by: Subject: Does the client hang or disconnect when the server's [EMAIL PROTECTED] .com 07/24/2003 11:24 AM Please respond to ORACLE-L I'm sorry, but I really can't remember how an Oracle SQLPlus client is supposed to behave when the database server's network interface is pulled out. We were testing a new Sun Cluster and tests for Storage FC Path Failure, Instance Failure, Node Failure, HeartBeat failure and single Network Interface failure all went through. However, when the engineer pulled out *both* network interfaces of the running database server node, the SQLPlus client that had been running INSERT statements just hung. It did not exit or error out till we killed the job. At the next restart, of course, it connected to the database which had already failed-over to the second node. The question is : Why does the SQLPlus client hang ? Telnet sessions also might hang [couldnt' test this out as the Servers are Secured and we didn't have SSH on the client], till the user hits the ENTER key, but shouldn't SQLPlus get server disconnect from the TCP stack ? Hemant K Chitale Oracle 9i Database Administrator Certified Professional My personal web site is : http://hkchital.tripod.com -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Hemant K Chitale INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Michael Boligan INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
Re: Does the client hang or disconnect when the server's
Hi! This sqlnet.expire_time affects server, not sqlplus itself AFAIK. The issue is likely, that sqlplus has sent a sqlnet request to server, but hasn't got any response since you pulled the network cable. Thus it'll wait until TCP connection gets timeout. Also, sqlplus is different from normal telnet, because it tries to send a request only when it is on it's prompt, thus issuing a command in sqlplus session, when it is waiting for response from previous command, doesn't send any network packets. Tanel. - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Thursday, July 24, 2003 6:54 PM Hemant, You are right it does get a timeout from the TCP stack, but the default for the connection timeout is 30 minutes. There is a sqlnet parameter where you can modify the timeout to make it shorter (sqlnet.expire_time?) Check metalink note 151972.1 for more info. HTH Mike Hemant K Chitale [EMAIL PROTECTED]To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] .com.sg cc: Sent by: Subject: Does the client hang or disconnect when the server's [EMAIL PROTECTED] .com 07/24/2003 11:24 AM Please respond to ORACLE-L I'm sorry, but I really can't remember how an Oracle SQLPlus client is supposed to behave when the database server's network interface is pulled out. We were testing a new Sun Cluster and tests for Storage FC Path Failure, Instance Failure, Node Failure, HeartBeat failure and single Network Interface failure all went through. However, when the engineer pulled out *both* network interfaces of the running database server node, the SQLPlus client that had been running INSERT statements just hung. It did not exit or error out till we killed the job. At the next restart, of course, it connected to the database which had already failed-over to the second node. The question is : Why does the SQLPlus client hang ? Telnet sessions also might hang [couldnt' test this out as the Servers are Secured and we didn't have SSH on the client], till the user hits the ENTER key, but shouldn't SQLPlus get server disconnect from the TCP stack ? Hemant K Chitale Oracle 9i Database Administrator Certified Professional My personal web site is : http://hkchital.tripod.com -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Hemant K Chitale INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Michael Boligan INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Tanel Poder INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
Re: Does the client hang or disconnect when the server's
I agree sqlnet.expire_time does only effect the server, but normally when the server kills the connection the client side will drop. But in this case it won't because there is no network for the client to get the dead connection timeout from the server. It sounds like Hemant is running OPS which AFAIK (version 7.3) he is getting the expected behavior, to get the client to seemlessly switch over to the other instance he needs RAC (again AFAIK). Tanel Poder tanel.poder.003@To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] mail.ee cc: Sent by: Subject: Re: Does the client hang or disconnect when the server's [EMAIL PROTECTED] .com 07/24/2003 12:19 PM Please respond to ORACLE-L Hi! This sqlnet.expire_time affects server, not sqlplus itself AFAIK. The issue is likely, that sqlplus has sent a sqlnet request to server, but hasn't got any response since you pulled the network cable. Thus it'll wait until TCP connection gets timeout. Also, sqlplus is different from normal telnet, because it tries to send a request only when it is on it's prompt, thus issuing a command in sqlplus session, when it is waiting for response from previous command, doesn't send any network packets. Tanel. - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Thursday, July 24, 2003 6:54 PM Hemant, You are right it does get a timeout from the TCP stack, but the default for the connection timeout is 30 minutes. There is a sqlnet parameter where you can modify the timeout to make it shorter (sqlnet.expire_time?) Check metalink note 151972.1 for more info. HTH Mike Hemant K Chitale [EMAIL PROTECTED]To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] .com.sg cc: Sent by: Subject: Does the client hang or disconnect when the server's [EMAIL PROTECTED] .com 07/24/2003 11:24 AM Please respond to ORACLE-L I'm sorry, but I really can't remember how an Oracle SQLPlus client is supposed to behave when the database server's network interface is pulled out. We were testing a new Sun Cluster and tests for Storage FC Path Failure, Instance Failure, Node Failure, HeartBeat failure and single Network Interface failure all went through. However, when the engineer pulled out *both* network interfaces of the running database server node, the SQLPlus client that had been running INSERT statements just hung. It did not exit or error out till we killed the job. At the next restart, of course, it connected to the database which had already failed-over to the second node. The question is : Why does the SQLPlus client hang ? Telnet sessions also might hang [couldnt' test this out as the Servers are Secured and we didn't have SSH on the client], till the user hits the ENTER key, but shouldn't SQLPlus get server disconnect from the TCP stack ? Hemant K Chitale Oracle 9i Database Administrator Certified Professional My personal web site is :
