[Xen-API] non-persistent stunnel connections

[Thomas Gazagnaire <thomas@xxxxxxxxxxxxxx>]

In one of my pool, I'm seeing a lot of:

Jun 12 08:37:48 localhost xapi: [debug|cl09-A-13|39854 UNIX 
/var/xapi/xapi||stunnel_cache] Cache contents: [ 10.219.67.16:443 (id 49243 / 
idle 0.00 age 0.03) ] 
Jun 12 08:37:48 localhost xapi: [debug|cl09-A-13|39854 UNIX 
/var/xapi/xapi||stunnel_cache] Removing stunnel id 49243 (idle 0.00) from the 
cache
Jun 12 08:37:48 localhost xapi: [debug|cl09-A-13|39854 UNIX 
/var/xapi/xapi||stunnel] check_reusable: caught exception Unix.Unix_error(31, 
"write", ""); assuming not reusable
Jun 12 08:37:48 localhost xapi: [debug|cl09-A-13|39854 UNIX 
/var/xapi/xapi||stunnel] get_reusable_stunnel: Found non-reusable stunnel in 
the cache. disconnecting from 10.219.67.16:443
Jun 12 08:37:48 localhost xapi: [debug|cl09-A-13|39854 UNIX 
/var/xapi/xapi||stunnel_cache] Cache contents: [ 10.219.67.16:443  ] 
Jun 12 08:37:48 localhost xapi: [debug|cl09-A-13|39854 UNIX 
/var/xapi/xapi||stunnel] get_reusable_stunnel: stunnel cache is empty; creating 
a fresh connection to 10.219.67.16:443
Jun 12 08:37:48 localhost xapi: [debug|cl09-A-13|39854 UNIX 
/var/xapi/xapi||stunnel] Using commandline: /usr/sbin/stunnel -fd 
1811b806-762e-dfb2-341d-a61d81ccdf1b
Jun 12 08:37:48 localhost xapi: [debug|cl09-A-13|39854 UNIX 
/var/xapi/xapi||stunnel] stunnel has pidty: (FEFork (40,9065))
Jun 12 08:37:48 localhost xapi: [debug|cl09-A-13|39854 UNIX 
/var/xapi/xapi||stunnel] stunnel start: Log from stunnel: []
Jun 12 08:37:48 localhost xapi: [debug|cl09-A-13|39854 UNIX 
/var/xapi/xapi||xmlrpc_client] stunnel pid: 9065 (cached = true) connected to 
10.219.67.16:443
Jun 12 08:37:48 localhost xapi: [debug|cl09-A-13|39854 UNIX 
/var/xapi/xapi||xmlrpc_client] with_recorded_stunnelpid task_opt=None s_pid=9065
Jun 12 08:37:48 localhost xapi: [debug|cl09-A-13|39854 UNIX 
/var/xapi/xapi||stunnel_cache] Adding stunnel id 49244 (idle 0.00) to the cache
Jun 12 08:37:48 localhost xapi: [debug|cl09-A-13|39854 UNIX 
/var/xapi/xapi||stunnel_cache] Cache contents: [ 10.219.67.16:443 (id 49244 / 
idle 0.00 age 0.03) ] 
Jun 12 08:37:48 localhost xapi: [debug|cl09-A-13|39854 UNIX 
/var/xapi/xapi||xmlrpc_client] stunnel pid: 9065 (cached = true) returned 
stunnel to cache
Jun 12 08:37:48 localhost xapi: [debug|cl09-A-13|39855 UNIX 
/var/xapi/xapi||mscgen] xapi=>xapi 
[label="<methodCall><methodName>SR.get_other_config</methodName><params><param><value><string>OpaqueRef:e650c6da-04bb-0bec-1fae-4f75b45e396b</string></value></param><param><value><string>OpaqueRef:9cf16f1d-0ecf-8984-c301-0db39c597eb7</string></value></param></params></methodCall>"];

on a slave, this means (if I understand correctly) that stunnel is not able to 
create a persistent connection. Is there any reason to that ?
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