Synapse does not specify explicit value for session timeout. By default ruby client uses RECEIVE_TIMEOUT=10000ms which leads to 20-sec session in zk server.
To verify that zk session is set to 36-sec, manual integration test was executed with zk server:
created an instance of client connecting to test zk server.
used 4-letter commands to dump connections on zk server: echo cons | nc localhost 2181 > cons.txt
verified the output that connection had 36-sec session with to=36001:
/172.18.26.75:53573[1](queued=0,recved=2,sent=2,sid=0x66055392eb24038e,lop=PING,est=1594240596217,to=36001,lcxid=0x0,lzxid=0xffffffffffffffff,lresp=22948687231,llat=1,minlat=0,avglat=2,maxlat=3)
gmcatsf
commented
4 years ago
Summary
Synapse does not specify explicit value for session timeout. By default ruby client uses RECEIVE_TIMEOUT=10000ms which leads to 20-sec session in zk server.
https://github.com/zk-ruby/zookeeper/blob/master/ext/c_zookeeper.rb#L20
The PR sets synapse session timeout to be 36-sec.
Test
echo cons | nc localhost 2181 > cons.txt/172.18.26.75:53573[1](queued=0,recved=2,sent=2,sid=0x66055392eb24038e,lop=PING,est=1594240596217,to=36001,lcxid=0x0,lzxid=0xffffffffffffffff,lresp=22948687231,llat=1,minlat=0,avglat=2,maxlat=3)Reviewers
@panchr @austin-zhu @Jason-Jian