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Posted to dev@qpid.apache.org by "Ulf Lilleengen (JIRA)" <ji...@apache.org> on 2018/03/01 12:32:00 UTC
[jira] [Created] (DISPATCH-935) Configuring the dispatch with lots
of addresses and autolinks cause a long startup time
Ulf Lilleengen created DISPATCH-935:
---------------------------------------
Summary: Configuring the dispatch with lots of addresses and autolinks cause a long startup time
Key: DISPATCH-935
URL: https://issues.apache.org/jira/browse/DISPATCH-935
Project: Qpid Dispatch
Issue Type: Bug
Affects Versions: 1.0.0
Reporter: Ulf Lilleengen
I made a simple script to generate a router config with a lot of addresses:
{code:java}
#!/bin/bash
cat<<EOF > router.conf
router {
mode: standalone
id: Router.A
defaultDistribution: balanced
}
listener {
name: main
host: 127.0.0.1
port: 5672
authenticatePeer: no
}
EOF
for i in `seq 1 5000`
do
echo "address {" >> router.conf
echo " prefix: addr$i" >> router.conf
echo " waypoint: true" >> router.conf
echo "}" >> router.conf
echo "" >> router.conf
echo "autoLink {" >> router.conf
echo " addr: addr$i" >> router.conf
echo " name: linkIn$i" >> router.conf
echo " dir: in" >> router.conf
echo "}" >> router.conf
echo "" >> router.conf
echo "autoLink {" >> router.conf
echo " addr: addr$i" >> router.conf
echo " name: linkOut$i" >> router.conf
echo " dir: out" >> router.conf
echo "}" >> router.conf
echo "" >> router.conf
done
{code}
Although configuring 5000 addresses statically might not be a normal use case, it seems to cause the router to spend "forever" reading config and initializing.
Doing a pstack reveals a lot of time spent in reading config:
{code:java}
#0 0x00007fd2ef8cdbf9 in lookdict_string () from /lib64/libpython2.7.so.1.0
2018-03-01 13:23:21.379050 +0100 ROUTER_CORE (info) Router Core thread exited │#1 0x00007fd2ef968a26 in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0
│#2 0x00007fd2ef969df9 in PyEval_EvalFrameEx (){code}
And
{code:java}
#0 0x00007fd2ef8cdbf9 in lookdict_string () from /lib64/libpython2.7.so.1.0 #1 0x00007fd2ef968a26 in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0 #2 0x00007fd2ef969df9 in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0 #3 0x00007fd2ef969df9 in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0{code}
And
{code:java}
#0 0x00007ff5cbd0184e in PyObject_RichCompare () from /lib64/libpython2.7.so.1.0 #1 0x00007ff5cbd017ef in PyObject_RichCompareBool () from /lib64/libpython2.7.so.1.0 #2 0x00007ff5cbd13784 in tuplecontains () from /lib64/libpython2.7.so.1.0 #3 0x00007ff5cbd99cba in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0 #4 0x00007ff5cbd98df9 in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0 #5 0x00007ff5cbd98df9 in PyEval_EvalFrameEx () from /lib64/libpython2.7.so.1.0{code}
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