Intermittently get proxy errors as following:
sending data to server failed: error:"no response: network error", info:""

No network errors are visible on any other software. Server shows no errors before or after proxy error.

At the same time, the server sends alerts from all active hosts monitored by proxy as following:

via Mailbox Transport; Wed, 8 Apr 2015 05:48:03 +0300

Trigger: Zabbix agent on example host is unreachable for 10 minutes Trigger status: PROBLEM Trigger severity: Average Trigger URL:

Item values:

1. Agent ping (example host:agent.ping): Up (1) 2. UNKNOWN (UNKNOWN:UNKNOWN): UNKNOWN 3. UNKNOWN (UNKNOWN:UNKNOWN): UNKNOWN

Simultaneously i get recovery message, :

id 15.0.847.32 via Mailbox Transport; Wed, 8 Apr 2015 05:48:03 +0300

Trigger: Zabbix agent on example host is unreachable for 10 minutes Trigger status: OK Trigger severity: Average Trigger URL:

Item values:

1. Agent ping (example host:agent.ping): Up (1) 2. UNKNOWN (UNKNOWN:UNKNOWN): UNKNOWN 3. UNKNOWN (UNKNOWN:UNKNOWN): UNKNOWN

I never get the error on all proxy hosts, it's always one proxy out of 7 in production use that does this. No solution or workaround found so far.