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Problem report
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Resolution: Fixed
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Major
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7.0.2
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None
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S24-W34/35, S24-W36/37
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2
This is possible to reproduce, using sender v7.0.1, sending to servers version 7.0.1.
Only from Windows, only when using encrypted connection.
When using zabbix_agent2.conf to read TSL params or when specifying them in command line.
Example output (obfuscated):
zabbix_sender.exe [10208]: DEBUG: OpenSSL library (version OpenSSL 1.1.1t 7 Feb 2023) initialized
zabbix_sender.exe [10208]: DEBUG: In zbx_tls_init_child()
zabbix_sender.exe [10208]: DEBUG: zbx_tls_init_child() loaded PSK identity "redacted"
zabbix_sender.exe [10208]: DEBUG: zbx_tls_init_child() loaded PSK from file "redacted"
zabbix_sender.exe [10208]: DEBUG: zbx_tls_init_child() PSK ciphersuites: TLS_CHACHA20_POLY1305_SHA256 TLS_AES_128_GCM_SHA256 ECDHE-PSK-AES128-CBC-SHA256 ECDHE-PSK-AES128-CBC-SHA PSK-AES128-GCM-SHA256 PSK-AES128-CCM8 PSK-AES128-CCM PSK-AES128-CBC-SHA256 PSK-AES128-CBC-SHA
zabbix_sender.exe [10208]: DEBUG: End of zbx_tls_init_child()
zabbix_sender.exe [3536]: DEBUG: In zbx_comms_exchange_with_redirect()
zabbix_sender.exe [128]: DEBUG: In zbx_comms_exchange_with_redirect()
zabbix_sender.exe [3536]: DEBUG: In zbx_connect_to_server() [host777.local]:10051 [timeout:60, connection timeout:3]
zabbix_sender.exe [128]: DEBUG: In zbx_connect_to_server() [host999.local]:10051 [timeout:60, connection timeout:3]
zabbix_sender.exe [3536]: DEBUG: In zbx_is_ip4() ip:'host777.local'
zabbix_sender.exe [128]: DEBUG: In zbx_is_ip4() ip:'host999.local'
zabbix_sender.exe [3536]: DEBUG: End of zbx_is_ip4():FAIL
zabbix_sender.exe [128]: DEBUG: End of zbx_is_ip4():FAIL
zabbix_sender.exe [3536]: DEBUG: In zbx_is_ip6() ip:'host777.local'
zabbix_sender.exe [128]: DEBUG: In zbx_is_ip6() ip:'host999.local'
zabbix_sender.exe [3536]: DEBUG: End of zbx_is_ip6():FAIL
zabbix_sender.exe [128]: DEBUG: End of zbx_is_ip6():FAIL
zabbix_sender.exe [128]: DEBUG: In zbx_is_ip4() ip:'host999.local'
zabbix_sender.exe [3536]: DEBUG: In zbx_is_ip4() ip:'host777.local'
zabbix_sender.exe [128]: DEBUG: End of zbx_is_ip4():FAIL
zabbix_sender.exe [3536]: DEBUG: End of zbx_is_ip4():FAIL
zabbix_sender.exe [128]: DEBUG: In zbx_is_ip6() ip:'host999.local'
zabbix_sender.exe [3536]: DEBUG: In zbx_is_ip6() ip:'host777.local'
zabbix_sender.exe [128]: DEBUG: End of zbx_is_ip6():FAIL
zabbix_sender.exe [3536]: DEBUG: End of zbx_is_ip6():FAIL
zabbix_sender.exe [128]: DEBUG: In zbx_tls_connect(): psk_identity:"redacted"
zabbix_sender.exe [3536]: DEBUG: In zbx_tls_connect(): psk_identity:"redacted"
zabbix_sender.exe [128]: DEBUG: zbx_psk_client_cb() requested PSK identity "redacted"
zabbix_sender.exe [3536]: DEBUG: zbx_psk_client_cb() requested PSK identity "redacted"
zabbix_sender.exe [128]: DEBUG: End of zbx_tls_connect():SUCCEED (established TLSv1.3 TLS_CHACHA20_POLY1305_SHA256)
zabbix_sender.exe [3536]: DEBUG: End of zbx_tls_connect():SUCCEED (established TLSv1.3 TLS_CHACHA20_POLY1305_SHA256)
zabbix_sender.exe [128]: DEBUG: End of zbx_connect_to_server():SUCCEED
zabbix_sender.exe [3536]: DEBUG: End of zbx_connect_to_server():SUCCEED
zabbix_sender.exe [128]: DEBUG: zbx_comms_exchange_with_redirect() sending: {"request":"sender data","data":[{"host":"host9040","key":"patchmanagement.maintenance","value":"maintenance-on"}],"clock":1724163279,"ns":475287500}
zabbix_sender.exe [3536]: DEBUG: zbx_comms_exchange_with_redirect() sending: {"request":"sender data","data":[{"host":"host9040","key":"patchmanagement.maintenance","value":"maintenance-on"}],"clock":1724163279,"ns":477000000,"
zabbix_sender.exe [128]: DEBUG: zbx_comms_exchange_with_redirect() received: {"response":"failed","info":"cannot parse as a valid JSON object: unexpected end of string data"}
zabbix_sender.exe [3536]: DEBUG: zbx_comms_exchange_with_redirect() received: {"response":"failed","info":"cannot parse as a valid JSON object: unexpected end of string data"}
zabbix_sender.exe [128]: DEBUG: End of zbx_comms_exchange_with_redirect():SUCCEED
zabbix_sender.exe [3536]: DEBUG: End of zbx_comms_exchange_with_redirect():SUCCEED
zabbix_sender.exe [128]: Warning: incorrect answer from "host999.local:10051": [{"response":"failed","info":"cannot parse as a valid JSON object: unexpected end of string data"}]
zabbix_sender.exe [3536]: Warning: incorrect answer from "host777.local:10051": [{"response":"failed","info":"cannot parse as a valid JSON object: unexpected end of string data"}]
sent: 1; skipped: 0; total: 1
At the time in zabbix_proxy.log we can see this error:
2184198:20240819:161606.392 received invalid JSON object from 1.1.1.1: cannot parse as a valid JSON object: unexpected end of string data
To reproduce that, just give 2 servers in -z parameter for zabbix sender:
-z "host777.local,host999.local"
Sometimes it's successful, but according to feedback, fails in most cases.
One more NOT working example and working one are attached as files.
- caused by
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ZBXNEXT-8758 Load balancing and HA for proxies
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- Closed
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