RE: No route to host

["Jeff Hill" <johill@lanl.gov>]

Title: No route to host

 

Hello,

 

à Unable to connect because "No route to host"

 

It would appear that there is, as suggested by the message, an IP level issue with Ârouting frames from pc1 to pc2. Is it possible to use the ping command (i.e. âping pc2â) to contact pc2? If that does not work then type ânetstat ârâ on pc1 and compare that output to the same type of ânetstat ârâ command on PC3.

 

à A call to "assert (_pTargetMutex == & mutexToVerify)" failed in ../../../include/epicsGuard.h line 84.

I am not sure what has caused this message â which is somewhat worrisome. It would be interesting to run the code under gdb, and obtain a stack trace for the thread that printing this message using the bt command (issued in gdb) . The stack trace produced in gdb will be easier to decipher if the CA client library has been built properly for debugging.

 

Jeff

 

From: tech-talk-bounces@aps.anl.gov [mailto:tech-talk-bounces@aps.anl.gov] On Behalf Of ???
Sent: Sunday, August 31, 2008 9:33 PM
To: tech-talk@aps.anl.gov
Subject: No route to host

 

 

Hello,

When I'm using "caget" in a PC No.1 to read data in PC No.2,  the following message displayed:
*********************************************************************************
CAC: Unable to connect because "No route to host"
CA.Client.Exception...............................................
    Warning: "Virtual circuit disconnect"
    Context: "10.10.254.124:5064"
    Source File: ../cac.cpp line 1126
    Current Time: Mon Sep 01 2008 11:04:15.122863235
..................................................................
Channel connect timed out: 'SR-BI:ConfCal' not found.

A call to "assert (_pTargetMutex == & mutexToVerify)" failed in ../../../include/epicsGuard.h line 84.
EPICS Release EPICS R3.14.9 $R3-14-9$ $2007/02/05 16:31:45$.
Current time Mon Sep 01 2008 11:04:16.091265952.
Please E-mail this message to Jeff Hill johill@lanl.gov or to tech-talk@aps.anl.gov
Calling epicsThreadSuspendSelf()
*************************************************************************************


If using "caget" in a PC No.3 to read data in PC No.2,  the following message displayed:
*************************************************************************************
CAC: Unable to connect because "No route to host"
CA.Client.Exception...............................................
    Warning: "Virtual circuit disconnect"
    Context: "10.10.254.124:5064"
    Source File: ../cac.cpp line 1142
    Current Time: Mon Sep 01 2008 12:29:01.861896000
..................................................................
Channel connect timed out: 'SR-BI:ConfCal' not found.
***************************************************************************************

Here is the basic information:
PC No.1
linux kernel:   2.6.23.1-42.fc8
epics_base version:  3.14.9

PC No.2
linux kernel:   2.6.9-42.0.3.EL
epics_base version:  3.14.8.2

PC No.3
linux kernel:   2.6.11-1.1369_FC4
epics_base version:  3.14.8.2

I have used "export EPICS_CA_ADDR_LIST" command in both PC No.1 & 3 , and the IOC runs normally in PC No.2.

How can I solve this problem?
Thank you.