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listener-thread@soc_be.c:3073: err = -25582:

Posted in 2018

Summary

Karthik saw repeated "listener-thread@soc_be.c:3073: err = -25582 ... Network connection is broken" messages in the online log on Informix 12.10.FC6 / RHEL 6.9, with clients losing connections and timing out; onstat -g ntt/nta and netstat gave no clues. Benjamin explained the message appears whenever anything connects to the listener port and disconnects without completing the Informix SQLI protocol (e.g. telnet/curl, a port scan or penetration test), regardless of whether telnet-server is enabled locally. Karthik later reported the actual cause in his case was a repeating query stuck in rollback, which triggered the broken-connection errors.

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Topics: Server Administration, Networking & sqlhosts Configuration

KARTHIK RAJAN — — source: IIUG Forums & Mailing Lists

Hi Folks, Recently we are getting this error at a random intervals . During this error the connection is lost from the client and it goes for a time out. Tried with onstat -g ntt,nta , netstat -an but no luck. Can anyone suggest how to find the root cause and fix the issue. Thanks in advance !!! Error from online message log :- ------------------------------- 09:31:09 listener-thread@soc_be.c:3073: err = -25582: oserr = 0: errstr = from abcdefgh-t.ka-abc.com to server informix_1 : Network connection is broken. 09:31:09 listener-thread@soc_be.c:3073: err = -25582: oserr = 0: errstr = from abcdefgh-t.ka-abc.com to server informix_1 : Network connection is broken. 09:31:09 listener-thread@soc_be.c:3073: err = -25582: oserr = 0: errstr = from abcdefgh-t.ka-abc.com to server informix_1 : Network connection is broken. From Onconfig :- --------------- NETTYPE soctcp,4,25,NET FASTPOLL 1

↪ replying to KARTHIK RAJAN
KARTHIK RAJAN — — source: IIUG Forums & Mailing Lists

Adding Version details Informix Version : IBM Informix Dynamic Server Version 12.10.FC6 O/S Version : Red Hat Enterprise Linux Server release 6.9 Thanks & Regards, Karthik Rajan

↪ replying to KARTHIK RAJAN
BENJAMIN — — source: IIUG Forums & Mailing Lists

The most likely explanation is a non-Informix connection to your listener. You can replicate this message using "telnet listener_ip listener_port". It might be a caused by a penetration test or similar. Ben.

↪ replying to BENJAMIN
KARTHIK RAJAN — — source: IIUG Forums & Mailing Lists

Thanks Ben for your response . But telnet is blocked on our server is any other way we get this error. Regards, Karthik Rajan

↪ replying to KARTHIK RAJAN
BENJAMIN — — source: IIUG Forums & Mailing Lists

The message will be seen whenever something connects to your Informix listener and disconnects without following the Informix SQLI protocol. This could be more or less anything like the telnet or curl client utilities or any program that opens a socket and disconnects. Whether telnet-server is running/blocked on your server is not relevant. Ben.

↪ replying to BENJAMIN
KARTHIK RAJAN — — source: IIUG Forums & Mailing Lists

Thanks Ben .

↪ replying to KARTHIK RAJAN
KARTHIK RAJAN — — source: IIUG Forums & Mailing Lists

Hi Ben, The issue was a repeating query in rollback state which caused the network broken error. Thanks for your support. Regards, Karthik Rajan

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