when using IP address in target OS map, the DNS lookup looks awful
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Key: TS-598
URL: https://issues.apache.org/jira/browse/TS-598
Project: Traffic Server
Issue Type: Improvement
Components: DNS, HTTP
Affects Versions: 2.1.4
Reporter: Zhao Yongming
the synthetic request make hostdb probes twice as it take 127.0.0.1 as hostname
in the first probe:
[Dec 18 23:44:55.021] Server {47000680340288} DEBUG: (hostdb) probe (null)
46886411A0102932 0 [ignore_timeout = 0]
[Dec 18 23:44:55.021] Server {47000680340288} DEBUG: (hostdb) delaying force 0
answer for (null)
[Dec 18 23:44:55.021] Server {47000680340288} DEBUG: (hostdb) probe
46886411A0102932 0 [ignore_timeout = 0]
[Dec 18 23:44:55.021] Server {47000680340288} DEBUG: (hostdb) DNS IP
202.43.216.49
[Dec 18 23:44:55.021] Server {47000680340288} DEBUG: (dns) received query �+�1
type = 12, timeout = 0
[Dec 18 23:44:55.021] Server {47000680340288} DEBUG: (dns) enqueing query
49.216.43.202.in-addr.arpa
[Dec 18 23:44:55.021] Server {47000680340288} DEBUG: (dns) adding first to
collapsing queue
[Dec 18 23:44:55.021] Server {47000680340288} DEBUG: (dns) send query for
49.216.43.202.in-addr.arpa to fd 33
[Dec 18 23:44:55.021] Server {47000680340288} DEBUG: (dns) sent qname =
49.216.43.202.in-addr.arpa, id = 46084, nameserver = 0
[Dec 18 23:44:55.021] Server {47000680340288} DEBUG: (dns) sent_one:
failover_number for resolver 0 is 1
[Dec 18 23:44:55.190] Server {47000680340288} DEBUG: (dns) received packet size
= 76
[Dec 18 23:44:55.190] Server {47000680340288} DEBUG: (dns) primary DNS response
code = 0
[Dec 18 23:44:55.190] Server {47000680340288} DEBUG: (dns) received PTR name =
dns2.cnb.yahoo.com
[Dec 18 23:44:55.190] Server {47000680340288} DEBUG: (dns) SUCCESS result for
49.216.43.202.in-addr.arpa = dns2.cnb.yahoo.com retry 0
[Dec 18 23:44:55.190] Server {47000680340288} DEBUG: (dns) called back
continuation for 49.216.43.202.in-addr.arpa
[Dec 18 23:44:55.190] Server {47000680340288} DEBUG: (hostdb) probe
46886411A0102932 0 [ignore_timeout = 1]
[Dec 18 23:44:55.190] Server {47000680340288} DEBUG: (hostdb_insert) inserting
in bucket 2550
[Dec 18 23:44:55.190] Server {47000680340288} DEBUG: (hostdb) inserting for: :
(md5: 46886411A0102932) now: 1292687086 timeout: 1200 ttl: 1200
[Dec 18 23:44:55.190] Server {47000680340288} DEBUG: (hostdb) done
'dns2.cnb.yahoo.com' TTL 1200
[Dec 18 23:44:55.191] Server {47000680340288} DEBUG: (hostdb) hostname =
dns2.cnb.yahoo.com
when using IP host as OS in remap, the dns lookup looks awful:
[Dec 19 00:42:24.656] Server {47412680705808} DEBUG: (hostdb) probe 127.0.0.1
F9D5E018CA21DEE0 1 [ignore_timeout = 0]
[Dec 19 00:42:24.656] Server {47412680705808} DEBUG: (hostdb) stale 728
1292689815 2097151, using it and refreshing it
[Dec 19 00:42:24.656] Server {47412680705808} DEBUG: (hostdb) immediate answer
for 127.0.0.1
[Dec 19 00:42:24.656] Server {47412680705808} DEBUG: (hostdb) probe (null)
AA30DE0F80A82135 1 [ignore_timeout = 0]
[Dec 19 00:42:24.656] Server {47412680705808} DEBUG: (hostdb) immediate answer
for <addr>
[Dec 19 00:42:24.656] Server {47412680705808} DEBUG: (hostdb) hostname =
localhost
[Dec 19 00:42:34.662] Server {47412681758480} DEBUG: (hostdb) probe 127.0.0.1
F9D5E018CA21DEE0 1 [ignore_timeout = 0]
[Dec 19 00:42:34.662] Server {47412681758480} DEBUG: (hostdb) immediate answer
for 127.0.0.1
[Dec 19 00:42:34.662] Server {47412681758480} DEBUG: (hostdb) probe (null)
AA30DE0F80A82135 1 [ignore_timeout = 0]
[Dec 19 00:42:34.662] Server {47412681758480} DEBUG: (hostdb) immediate answer
for <addr>
[Dec 19 00:42:34.662] Server {47412681758480} DEBUG: (hostdb) hostname =
localhost
[Dec 19 00:42:36.294] Server {47412671220544} DEBUG: (hostdb) probe
115.238.23.250 247FD52B368AF112 0 [ignore_timeout = 0]
[Dec 19 00:42:36.294] Server {47412671220544} DEBUG: (hostdb) delaying force 0
answer for 115.238.23.250 [timeout 0]
[Dec 19 00:42:36.310] Server {47412671220544} DEBUG: (hostdb) probe
115.238.23.250 247FD52B368AF112 0 [ignore_timeout = 0]
[Dec 19 00:42:36.310] Server {47412671220544} DEBUG: (hostdb) DNS 115.238.23.250
[Dec 19 00:42:36.310] Server {47412671220544} DEBUG: (hostdb_insert) inserting
in bucket 620
[Dec 19 00:42:36.310] Server {47412671220544} DEBUG: (hostdb) inserting for:
115.238.23.250: (md5: 247FD52B368AF112) now: 1292690555 timeout: 2097151 ttl:
2097151
[Dec 19 00:42:36.310] Server {47412671220544} DEBUG: (hostdb) done
115.238.23.250 TTL 2097151
[Dec 19 00:42:36.310] Server {47412671220544} DEBUG: (hostdb) probe (null)
3566BAF8CDEE083D 0 [ignore_timeout = 0]
[Dec 19 00:42:36.310] Server {47412671220544} DEBUG: (hostdb) delaying force 0
answer for (null)
[Dec 19 00:42:36.310] Server {47412671220544} DEBUG: (hostdb) probe
3566BAF8CDEE083D 0 [ignore_timeout = 0]
[Dec 19 00:42:36.310] Server {47412671220544} DEBUG: (hostdb) DNS IP
115.238.23.250
[Dec 19 00:42:36.310] Server {47412671220544} DEBUG: (dns) received query s��
type = 12, timeout = 0
[Dec 19 00:42:36.312] Server {47412671220544} DEBUG: (dns) enqueing query
250.23.238.115.in-addr.arpa
[Dec 19 00:42:36.312] Server {47412671220544} DEBUG: (dns) adding first to
collapsing queue
[Dec 19 00:42:36.312] Server {47412671220544} DEBUG: (dns) send query for
250.23.238.115.in-addr.arpa to fd 33
[Dec 19 00:42:36.312] Server {47412671220544} DEBUG: (dns) sent qname =
250.23.238.115.in-addr.arpa, id = 21309, nameserver = 0
[Dec 19 00:42:36.312] Server {47412671220544} DEBUG: (dns) sent_one:
failover_number for resolver 0 is 1
[Dec 19 00:42:36.350] Server {47412671220544} DEBUG: (dns) received packet size
= 103
[Dec 19 00:42:36.350] Server {47412671220544} DEBUG: (dns) primary DNS response
code = 3
[Dec 19 00:42:36.350] Server {47412671220544} DEBUG: (dns) received rcode = 3
[Dec 19 00:42:36.350] Server {47412671220544} DEBUG: (dns) DNS error 3 for
[250.23.238.115.in-addr.arpa]
[Dec 19 00:42:36.350] Server {47412671220544} DEBUG: (dns) domain extending
250.23.238.115.in-addr.arpa
[Dec 19 00:42:36.350] Server {47412671220544} DEBUG: (dns) new name = . retries
= 5
[Dec 19 00:42:36.350] Server {47412671220544} DEBUG: (dns) send query for . to
fd 33
[Dec 19 00:42:36.350] Server {47412671220544} DEBUG: (dns) sent qname = ., id =
30807, nameserver = 0
[Dec 19 00:42:36.350] Server {47412671220544} DEBUG: (dns) sent_one:
failover_number for resolver 0 is 1
[Dec 19 00:42:36.701] Server {47412671220544} DEBUG: (dns) received packet size
= 92
[Dec 19 00:42:36.701] Server {47412671220544} DEBUG: (dns) primary DNS response
code = 0
[Dec 19 00:42:36.701] Server {47412671220544} DEBUG: (dns) received rcode = 0
[Dec 19 00:42:36.701] Server {47412671220544} DEBUG: (dns) DNS error 0 for [.]
[Dec 19 00:42:36.701] Server {47412671220544} DEBUG: (dns) FAIL result for . =
<not found> retry 0
[Dec 19 00:42:36.701] Server {47412671220544} DEBUG: (dns) called back
continuation for .
[Dec 19 00:42:36.701] Server {47412671220544} DEBUG: (hostdb) probe
3566BAF8CDEE083D 0 [ignore_timeout = 1]
[Dec 19 00:42:36.701] Server {47412671220544} DEBUG: (hostdb) failed for
115.238.23.250
[Dec 19 00:42:36.701] Server {47412671220544} DEBUG: (hostdb_insert) inserting
in bucket 2221
[Dec 19 00:42:36.701] Server {47412671220544} DEBUG: (hostdb) inserting for: :
(md5: 3566BAF8CDEE083D) now: 1292690555 timeout: 0 ttl: 0
[Dec 19 00:42:36.759] Server {47412671220544} DEBUG: (hostdb) probe
115.238.23.250 247FD52B368AF112 1 [ignore_timeout = 0]
[Dec 19 00:42:36.759] Server {47412671220544} DEBUG: (hostdb) immediate setby
for 115.238.23.250
[Dec 19 00:42:44.664] Server {47412679653136} DEBUG: (hostdb) probe 127.0.0.1
F9D5E018CA21DEE0 1 [ignore_timeout = 0]
[Dec 19 00:42:44.664] Server {47412679653136} DEBUG: (hostdb) immediate answer
for 127.0.0.1
[Dec 19 00:42:44.665] Server {47412679653136} DEBUG: (hostdb) probe (null)
AA30DE0F80A82135 1 [ignore_timeout = 0]
[Dec 19 00:42:44.665] Server {47412679653136} DEBUG: (hostdb) immediate answer
for <addr>
[Dec 19 00:42:44.665] Server {47412679653136} DEBUG: (hostdb) hostname =
localhost
we should fix it in http or hostdb
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