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https://issues.apache.org/jira/browse/SOLR-16350?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17628120#comment-17628120
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Shubanker commented on SOLR-16350:
----------------------------------
[~krisden] Yes I did try accessing it over 127.0.0.1, the delay is not while
making a connection to SOLR server but rather SOLR processing internally.
I saved the log of a simple GET Request of _/solr/admin/cores?wt=json_ and here
is the part of log where you can see the time difference at
{_}QueuedThreadPool ran CEP:SocketChannelEndPoint@1177a867{_}:
{quote}2022-08-23 10:46:54.516 DEBUG (qtp156710276-24) []
o.e.j.i.ChannelEndPoint changeInterests p=false 0->1 for
SocketChannelEndPoint@1177a867\{l=/172.17.0.2:8983,r=/172.17.0.1:63578,OPEN,fill=FI,flush=-,to=0/120000}{io=0/1,kio=0,kro=1}->HttpConnection@3c82c535[p=HttpParser\{s=START,0
of
-1},g=HttpGenerator@28258fd1\{s=START}]=>HttpChannelOverHttp@a882b5b\{s=HttpChannelState@1d440803{s=IDLE
rs=BLOCKING os=OPEN is=IDLE awp=false se=false i=true
al=0},r=1,c=false/false,a=IDLE,uri=null,age=0}
2022-08-23 10:46:54.517 DEBUG (qtp156710276-24) [] o.e.j.i.ManagedSelector
Queued change lazy=false
org.eclipse.jetty.io.ChannelEndPoint$$Lambda$684/0x0000000800fc3ba0@67447191 on
ManagedSelector@a5bbaec\{STARTED} id=1 keys=1 selected=0 updates=0
2022-08-23 10:46:54.517 DEBUG (qtp156710276-24) [] o.e.j.i.ManagedSelector
Wakeup on submit ManagedSelector@a5bbaec\{STARTED} id=1 keys=1 selected=0
updates=1
2022-08-23 10:46:54.517 DEBUG (qtp156710276-19) [] o.e.j.i.ManagedSelector
Selector sun.nio.ch.EPollSelectorImpl@373889ae woken with none selected
2022-08-23 10:46:54.517 DEBUG (qtp156710276-19) [] o.e.j.i.ManagedSelector
Selector sun.nio.ch.EPollSelectorImpl@373889ae woken up from select, 0/0/1
selected
2022-08-23 10:46:54.517 DEBUG (qtp156710276-19) [] o.e.j.i.ManagedSelector
Selector sun.nio.ch.EPollSelectorImpl@373889ae processing 0 keys, 1 updates
2022-08-23 10:46:54.517 DEBUG (qtp156710276-19) [] o.e.j.i.ManagedSelector
updateable 1
2022-08-23 10:46:54.517 DEBUG (qtp156710276-19) [] o.e.j.i.ManagedSelector
update
org.eclipse.jetty.io.ChannelEndPoint$$Lambda$684/0x0000000800fc3ba0@67447191
2022-08-23 10:46:54.517 DEBUG (qtp156710276-19) [] o.e.j.i.ChannelEndPoint Key
interests updated 0 -> 1 on
SocketChannelEndPoint@1177a867\{l=/172.17.0.2:8983,r=/172.17.0.1:63578,OPEN,fill=FI,flush=-,to=1/120000}{io=1/1,kio=1,kro=1}->HttpConnection@3c82c535[p=HttpParser\{s=START,0
of
-1},g=HttpGenerator@28258fd1\{s=START}]=>HttpChannelOverHttp@a882b5b\{s=HttpChannelState@1d440803{s=IDLE
rs=BLOCKING os=OPEN is=IDLE awp=false se=false i=true
al=0},r=1,c=false/false,a=IDLE,uri=null,age=0}
2022-08-23 10:46:54.517 DEBUG (qtp156710276-19) [] o.e.j.i.ManagedSelector
updates 0
2022-08-23 10:46:54.517 DEBUG (qtp156710276-19) [] o.e.j.i.ManagedSelector
Selector sun.nio.ch.EPollSelectorImpl@373889ae waiting with 1 keys
2022-08-23 10:46:54.518 DEBUG (qtp156710276-24) [] o.e.j.s.HttpConnection
HttpConnection@3c82c535::SocketChannelEndPoint@1177a867\{l=/172.17.0.2:8983,r=/172.17.0.1:63578,OPEN,fill=FI,flush=-,to=1/120000}{io=1/1,kio=1,kro=1}->HttpConnection@3c82c535[p=HttpParser\{s=START,0
of
-1},g=HttpGenerator@28258fd1\{s=START}]=>HttpChannelOverHttp@a882b5b\{s=HttpChannelState@1d440803{s=IDLE
rs=BLOCKING os=OPEN is=IDLE awp=false se=false i=true
al=0},r=1,c=false/false,a=IDLE,uri=null,age=0} onFillable exit
HttpChannelState@1d440803\{s=IDLE rs=BLOCKING os=OPEN is=IDLE awp=false
se=false i=true al=0} null
2022-08-23 10:46:54.518 DEBUG (qtp156710276-24) [] o.e.j.u.t.QueuedThreadPool
ran
CEP:SocketChannelEndPoint@1177a867\{l=/172.17.0.2:8983,r=/172.17.0.1:63578,OPEN,fill=FI,flush=-,to=2/120000}{io=1/1,kio=1,kro=1}->HttpConnection@3c82c535[p=HttpParser\{s=START,0
of
-1},g=HttpGenerator@28258fd1\{s=START}]=>HttpChannelOverHttp@a882b5b\{s=HttpChannelState@1d440803{s=IDLE
rs=BLOCKING os=OPEN is=IDLE awp=false se=false i=true
al=0},r=1,c=false/false,a=IDLE,uri=null,age=0}:runFillable:BLOCKING in
InstrumentedQueuedThreadPool[qtp156710276]@9573584\{STARTED,10<=10<=10000,i=4,r=-1,q=0}[ReservedThreadExecutor@2aa7399c\{reserved=1/6,pending=0}]
2022-08-23 10:47:01.442 DEBUG (qtp156710276-19) [] o.e.j.i.ManagedSelector
Selector sun.nio.ch.EPollSelectorImpl@373889ae woken up from select, 1/1/1
selected
2022-08-23 10:47:01.442 DEBUG (qtp156710276-19) [] o.e.j.i.ManagedSelector
Selector sun.nio.ch.EPollSelectorImpl@373889ae processing 1 keys, 0 updates
2022-08-23 10:47:01.442 DEBUG (qtp156710276-19) [] o.e.j.i.ManagedSelector
selected 1 channel=java.nio.channels.SocketChannel[connected
local=localhost/127.0.0.1:8983 remote=/172.17.0.1:63578],
selector=sun.nio.ch.EPollSelectorImpl@373889ae, interestOps=1, readyOps=1
SocketChannelEndPoint@1177a867\{l=/172.17.0.2:8983,r=/172.17.0.1:63578,OPEN,fill=FI,flush=-,to=6948/120000}{io=1/1,kio=1,kro=1}->HttpConnection@3c82c535[p=HttpParser\{s=START,0
of
-1},g=HttpGenerator@28258fd1\{s=START}]=>HttpChannelOverHttp@a882b5b\{s=HttpChannelState@1d440803{s=IDLE
rs=BLOCKING os=OPEN is=IDLE awp=false se=false i=true
al=0},r=1,c=false/false,a=IDLE,uri=null,age=0}
2022-08-23 10:47:01.443 DEBUG (qtp156710276-19) [] o.e.j.i.ChannelEndPoint
onSelected 1->0 r=true w=false for
SocketChannelEndPoint@1177a867\{l=/172.17.0.2:8983,r=/172.17.0.1:63578,OPEN,fill=FI,flush=-,to=6948/120000}{io=1/0,kio=1,kro=1}->HttpConnection@3c82c535[p=HttpParser\{s=START,0
of
-1},g=HttpGenerator@28258fd1\{s=START}]=>HttpChannelOverHttp@a882b5b\{s=HttpChannelState@1d440803{s=IDLE
rs=BLOCKING os=OPEN is=IDLE awp=false se=false i=true
al=0},r=1,c=false/false,a=IDLE,uri=null,age=0}
2022-08-23 10:47:01.443 DEBUG (qtp156710276-19) [] o.e.j.i.ChannelEndPoint task
CEP:SocketChannelEndPoint@1177a867\{l=/172.17.0.2:8983,r=/172.17.0.1:63578,OPEN,fill=FI,flush=-,to=6949/120000}{io=1/0,kio=1,kro=1}->HttpConnection@3c82c535[p=HttpParser\{s=START,0
of
-1},g=HttpGenerator@28258fd1\{s=START}]=>HttpChannelOverHttp@a882b5b\{s=HttpChannelState@1d440803{s=IDLE
rs=BLOCKING os=OPEN is=IDLE awp=false se=false i=true
al=0},r=1,c=false/false,a=IDLE,uri=null,age=0}:runFillable:BLOCKING
2022-08-23 10:47:01.443 DEBUG (qtp156710276-19) []
o.e.j.u.t.ReservedThreadExecutor
ReservedThreadExecutor@2aa7399c\{reserved=1/6,pending=0} tryExecute
EatWhatYouKill@708f018e/SelectorProducer@19a31b9d/PRODUCING/p=false/InstrumentedQueuedThreadPool[qtp156710276]@9573584\{STARTED,10<=10<=10000,i=5,r=-1,q=0}[ReservedThreadExecutor@2aa7399c\{reserved=1/6,pending=0}][pc=0,pic=0,pec=1,epc=0]@2022-08-23T10:47:01.443729322Z
2022-08-23 10:47:01.443 DEBUG (qtp156710276-19) []
o.e.j.u.t.ReservedThreadExecutor
ReservedThreadExecutor@2aa7399c\{reserved=0/6,pending=1} startReservedThread p=1
2022-08-23 10:47:01.444 DEBUG (qtp156710276-19) [] o.e.j.u.t.QueuedThreadPool
queue ReservedThread@3ee5c86f\{PENDING,thread=null} startThread=0
2022-08-23 10:47:01.444 DEBUG (qtp156710276-19) [] o.e.j.u.t.s.EatWhatYouKill
EatWhatYouKill@708f018e/SelectorProducer@19a31b9d/IDLE/p=true/InstrumentedQueuedThreadPool[qtp156710276]@9573584\{STARTED,10<=10<=10000,i=4,r=-1,q=0}[ReservedThreadExecutor@2aa7399c\{reserved=0/6,pending=1}][pc=0,pic=0,pec=1,epc=0]@2022-08-23T10:47:01.444120052Z
m=EXECUTE_PRODUCE_CONSUME
t=CEP:SocketChannelEndPoint@1177a867\{l=/172.17.0.2:8983,r=/172.17.0.1:63578,OPEN,fill=FI,flush=-,to=6950/120000}{io=1/0,kio=1,kro=1}->HttpConnection@3c82c535[p=HttpParser\{s=START,0
of
-1},g=HttpGenerator@28258fd1\{s=START}]=>HttpChannelOverHttp@a882b5b\{s=HttpChannelState@1d440803{s=IDLE
rs=BLOCKING os=OPEN is=IDLE awp=false se=false i=true
al=0},r=1,c=false/false,a=IDLE,uri=null,age=0}:runFillable:BLOCKING/BLOCKING
2022-08-23 10:47:01.444 DEBUG (qtp156710276-25) [] o.e.j.u.t.QueuedThreadPool
run ReservedThread@3ee5c86f\{PENDING,thread=null} in
InstrumentedQueuedThreadPool[qtp156710276]@9573584\{STARTED,10<=10<=10000,i=4,r=-1,q=0}[ReservedThreadExecutor@2aa7399c\{reserved=0/6,pending=1}]
2022-08-23 10:47:01.444 DEBUG (qtp156710276-23) []
o.e.j.u.t.ReservedThreadExecutor
ReservedThread@1064c9f1\{RESERVED,thread=Thread[qtp156710276-23,5,main]}
task=EatWhatYouKill@708f018e/SelectorProducer@19a31b9d/IDLE/p=true/InstrumentedQueuedThreadPool[qtp156710276]@9573584\{STARTED,10<=10<=10000,i=4,r=-1,q=0}[ReservedThreadExecutor@2aa7399c\{reserved=0/6,pending=1}][pc=0,pic=0,pec=1,epc=1]@2022-08-23T10:47:01.444537283Z
ReservedThreadExecutor@2aa7399c\{reserved=0/6,pending=1}
2022-08-23 10:47:01.444 DEBUG (qtp156710276-23) [] o.e.j.u.t.s.EatWhatYouKill
EatWhatYouKill@708f018e/SelectorProducer@19a31b9d/IDLE/p=true/InstrumentedQueuedThreadPool[qtp156710276]@9573584\{STARTED,10<=10<=10000,i=4,r=-1,q=0}[ReservedThreadExecutor@2aa7399c\{reserved=1/6,pending=0}][pc=0,pic=0,pec=1,epc=1]@2022-08-23T10:47:01.444714142Z
tryProduce true
2022-08-23 10:47:01.444 DEBUG (qtp156710276-23) [] o.e.j.i.ManagedSelector
updateable 0
2022-08-23 10:47:01.445 DEBUG (qtp156710276-23) [] o.e.j.i.ManagedSelector
updates 0{quote}
> http response is delayed when solr is running in slow/restricted network
> environment
> ------------------------------------------------------------------------------------
>
> Key: SOLR-16350
> URL: https://issues.apache.org/jira/browse/SOLR-16350
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: Admin UI
> Affects Versions: 9.0
> Environment: !image-2022-08-23-09-56-45-250.png|width=327,height=170!
> restrict/delay internet and DNS resolution time.
> Reporter: Shubanker
> Priority: Major
> Attachments: image-2022-08-23-09-56-45-250.png,
> image-2022-08-23-09-59-25-775.png, image-2022-08-23-10-01-40-456.png,
> image-2022-08-23-10-03-45-870.png
>
>
> While trying to setup SOLR 9 I noticed the response takes longer to complete
> if the internet is slow/restricted.
> I tried replicating in local by delaying DNS response and the request started
> taking over 4s while the query itself (QTime) is faster.
> !image-2022-08-23-10-03-45-870.png|width=429,height=150!
> !image-2022-08-23-09-59-25-775.png|width=301,height=188!
> even the static files of Admin UI take too long to load.
> related StackOverflow
> [question|https://stackoverflow.com/questions/73444575/solr-9-http-response-time-is-very-slow-while-query-itself-is-fast].
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