Thanks for help, Flow!
I use log formatting now, here is a sample. But in this particular case it seems that android hanged network for two minutes (Android 6)… But the application is in battery white list. I will add logs with other cases as soon as I get them.
2017-01-16_14-32-39 <<< Android LTE connected >>>
2017-01-16_14-32-40 <<< Starting connection… >>>
2017-01-16_14-32-40 D/de.measite.minidns.AbstractDNSClient﹕ Asking /10.10.30.118 on 53 for _xmpp-client._tcp.redsolution.com. IN SRV with:
DNSMessage(24664 QUERY NO_ERROR query[qr=0] rd)
[Q: _xmpp-client._tcp.redsolution.com. IN SRV]
[X: EDNS: version: 0, flags:; udp: 1024]
2017-01-16_14-32-40 D/de.measite.minidns.AbstractDNSClient﹕ Response from /10.10.30.118 on 53 for _xmpp-client._tcp.redsolution.com. IN SRV:
DNSMessage(24664 QUERY NO_ERROR resp[qr=1] rd ra)
[Q: _xmpp-client._tcp.redsolution.com. IN SRV]
[A: _xmpp-client._tcp.redsolution.com. 24466 IN SRV 10 5 5222 raven.redsolution.ru.]
[N: redsolution.com. 24466 IN NS ns5.linode.com.]
[N: redsolution.com. 24466 IN NS ns4.linode.com.]
[N: redsolution.com. 24466 IN NS ns1.linode.com.]
[N: redsolution.com. 24466 IN NS ns2.linode.com.]
[N: redsolution.com. 24466 IN NS ns3.linode.com.]
[X: raven.redsolution.ru. 25195 IN A 188.226.175.57]
[X: ns1.linode.com. 9997 IN A 162.159.27.72]
[X: ns1.linode.com. 57170 IN AAAA 2400:cb00:2049:1:0:0:a29f:1a63]
[X: ns2.linode.com. 106294 IN A 162.159.24.39]
[X: ns2.linode.com. 106294 IN AAAA 2400:cb00:2049:1:0:0:a29f:1827]
[X: ns3.linode.com. 106294 IN A 162.159.25.129]
[X: ns3.linode.com. 106294 IN AAAA 2400:cb00:2049:1:0:0:a29f:1981]
[X: ns4.linode.com. 137673 IN A 162.159.26.99]
[X: ns4.linode.com. 137673 IN AAAA 2400:cb00:2049:1:0:0:a29f:1b48]
[X: ns5.linode.com. 144650 IN A 162.159.24.25]
[X: ns5.linode.com. 144650 IN AAAA 2400:cb00:2049:1:0:0:a29f:1819]
[X: EDNS: version: 0, flags:; udp: 4096]
2017-01-16_14-32-40 D/de.measite.minidns.AbstractDNSClient﹕ Asking /10.10.30.118 on 53 for raven.redsolution.ru. IN A with:
DNSMessage(48154 QUERY NO_ERROR query[qr=0] rd)
[Q: raven.redsolution.ru. IN A]
[X: EDNS: version: 0, flags:; udp: 1024]
2017-01-16_14-32-40 D/de.measite.minidns.AbstractDNSClient﹕ Response from /10.10.30.118 on 53 for raven.redsolution.ru. IN A:
DNSMessage(48154 QUERY NO_ERROR resp[qr=1] rd ra)
[Q: raven.redsolution.ru. IN A]
[A: raven.redsolution.ru. 25195 IN A 188.226.175.57]
[N: redsolution.ru. 40869 IN NS ns2.linode.com.]
[N: redsolution.ru. 40869 IN NS ns3.linode.com.]
[N: redsolution.ru. 40869 IN NS ns5.linode.com.]
[N: redsolution.ru. 40869 IN NS ns4.linode.com.]
[N: redsolution.ru. 40869 IN NS ns1.linode.com.]
[X: ns1.linode.com. 9997 IN A 162.159.27.72]
[X: ns1.linode.com. 57170 IN AAAA 2400:cb00:2049:1:0:0:a29f:1a63]
[X: ns2.linode.com. 106294 IN A 162.159.24.39]
[X: ns2.linode.com. 106294 IN AAAA 2400:cb00:2049:1:0:0:a29f:1827]
[X: ns3.linode.com. 106294 IN A 162.159.25.129]
[X: ns3.linode.com. 106294 IN AAAA 2400:cb00:2049:1:0:0:a29f:1981]
[X: ns4.linode.com. 137673 IN A 162.159.26.99]
[X: ns4.linode.com. 137673 IN AAAA 2400:cb00:2049:1:0:0:a29f:1b48]
[X: ns5.linode.com. 144650 IN A 162.159.24.25]
[X: ns5.linode.com. 144650 IN AAAA 2400:cb00:2049:1:0:0:a29f:1819]
[X: EDNS: version: 0, flags:; udp: 4096]
2017-01-16_14-32-40 D/de.measite.minidns.AbstractDNSClient﹕ Asking /10.10.30.118 on 53 for raven.redsolution.ru. IN AAAA with:
DNSMessage(5738 QUERY NO_ERROR query[qr=0] rd)
[Q: raven.redsolution.ru. IN AAAA]
[X: EDNS: version: 0, flags:; udp: 1024]
2017-01-16_14-32-40 D/de.measite.minidns.AbstractDNSClient﹕ Response from /10.10.30.118 on 53 for raven.redsolution.ru. IN AAAA:
DNSMessage(5738 QUERY NO_ERROR resp[qr=1] rd ra)
[Q: raven.redsolution.ru. IN AAAA]
[N: redsolution.ru. 6000 IN SOA ns1.linode.com. webmaster.redsolution.ru. 2017011212 14400 14400 1209600 86400]
[X: EDNS: version: 0, flags:; udp: 4096]
2017-01-16_14-32-40 D/org.jivesoftware.smack.util.DNSUtil﹕ Resolved SRV RR for _xmpp-client._tcp.redsolution.com: raven.redsolution.ru:5222 prio:10:w:5
2017-01-16_14-32-40 D/de.measite.minidns.AbstractDNSClient﹕ Asking /10.10.30.118 on 53 for redsolution.com. IN A with:
DNSMessage(24218 QUERY NO_ERROR query[qr=0] rd)
[Q: redsolution.com. IN A]
[X: EDNS: version: 0, flags:; udp: 1024]
2017-01-16_14-32-40 D/de.measite.minidns.AbstractDNSClient﹕ Response from /10.10.30.118 on 53 for redsolution.com. IN A:
DNSMessage(24218 QUERY NO_ERROR resp[qr=1] rd ra)
[Q: redsolution.com. IN A]
[A: redsolution.com. 25804 IN A 178.79.128.253]
[N: redsolution.com. 24465 IN NS ns4.linode.com.]
[N: redsolution.com. 24465 IN NS ns2.linode.com.]
[N: redsolution.com. 24465 IN NS ns5.linode.com.]
[N: redsolution.com. 24465 IN NS ns1.linode.com.]
[N: redsolution.com. 24465 IN NS ns3.linode.com.]
[X: ns1.linode.com. 9996 IN A 162.159.27.72]
[X: ns1.linode.com. 57169 IN AAAA 2400:cb00:2049:1:0:0:a29f:1a63]
[X: ns2.linode.com. 106293 IN A 162.159.24.39]
[X: ns2.linode.com. 106293 IN AAAA 2400:cb00:2049:1:0:0:a29f:1827]
[X: ns3.linode.com. 106293 IN A 162.159.25.129]
[X: ns3.linode.com. 106293 IN AAAA 2400:cb00:2049:1:0:0:a29f:1981]
[X: ns4.linode.com. 137672 IN A 162.159.26.99]
[X: ns4.linode.com. 137672 IN AAAA 2400:cb00:2049:1:0:0:a29f:1b48]
[X: ns5.linode.com. 144649 IN A 162.159.24.25]
[X: ns5.linode.com. 144649 IN AAAA 2400:cb00:2049:1:0:0:a29f:1819]
[X: EDNS: version: 0, flags:; udp: 4096]
2017-01-16_14-32-40 D/de.measite.minidns.AbstractDNSClient﹕ Asking /10.10.30.118 on 53 for redsolution.com. IN AAAA with:
DNSMessage(12865 QUERY NO_ERROR query[qr=0] rd)
[Q: redsolution.com. IN AAAA]
[X: EDNS: version: 0, flags:; udp: 1024]
2017-01-16_14-32-44 <<< Android WiFI connected >>>
2017-01-16_14-34-52 <<< Android Screen is on >>>
2017-01-16_14-34-56 D/de.measite.minidns.AbstractDNSClient﹕ IOException /10.10.30.118 on 53 while resolving redsolution.com. IN AAAA: de.measite.minidns.util.MultipleIoException: null, failed to connect to /10.10.30.118 (port 53) after 5000ms: isConnected failed: ENETUNREACH (Network is unreachable)
2017-01-16_14-34-56 D/de.measite.minidns.AbstractDNSClient﹕ Asking /10.10.30.122 on 53 for redsolution.com. IN AAAA with:
DNSMessage(12865 QUERY NO_ERROR query[qr=0] rd)
[Q: redsolution.com. IN AAAA]
[X: EDNS: version: 0, flags:; udp: 1024]
2017-01-16_14-35-01 D/de.measite.minidns.AbstractDNSClient﹕ IOException /10.10.30.122 on 53 while resolving redsolution.com. IN AAAA: de.measite.minidns.util.MultipleIoException: null, failed to connect to /10.10.30.122 (port 53) after 5000ms: isConnected failed: ENETUNREACH (Network is unreachable)
2017-01-16_14-35-01 D/de.measite.minidns.AbstractDNSClient﹕ Asking /8.8.8.8 on 53 for redsolution.com. IN AAAA with:
DNSMessage(12865 QUERY NO_ERROR query[qr=0] rd)
[Q: redsolution.com. IN AAAA]
[X: EDNS: version: 0, flags:; udp: 1024]
2017-01-16_14-35-02 D/de.measite.minidns.AbstractDNSClient﹕ Response from /8.8.8.8 on 53 for redsolution.com. IN AAAA:
DNSMessage(12865 QUERY NO_ERROR resp[qr=1] rd ra)
[Q: redsolution.com. IN AAAA]
[N: redsolution.com. 1799 IN SOA ns1.linode.com. webmaster.redsolution.ru. 2016122205 14400 14400 1209600 86400]
[X: EDNS: version: 0, flags:; udp: 512]
2017-01-16_14-35-02 D/org.jivesoftware.smack.tcp.XMPPTCPConnection﹕ Trying to establish TCP connection to /188.226.175.57 at port 5222
2017-01-16_14-35-02 D/org.jivesoftware.smack.tcp.XMPPTCPConnection﹕ Established TCP connection to /188.226.175.57 at port 5222