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From "Maximillian Dornseif (JIRA)" <j...@apache.org>
Subject [jira] Commented: (COUCHDB-197) Replication renders CouchDB unresponsive.
Date Tue, 06 Jan 2009 16:10:44 GMT

    [ https://issues.apache.org/jira/browse/COUCHDB-197?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12661185#action_12661185
] 

Maximillian Dornseif commented on COUCHDB-197:
----------------------------------------------

Following Adams suggestion I initiated replication on the destination server, changing direction
from push to pull. 

So far it looks quite good. 10.6 GB / 522008 Docs have been replicated without any issues
so far.



> Replication renders CouchDB unresponsive.
> -----------------------------------------
>
>                 Key: COUCHDB-197
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-197
>             Project: CouchDB
>          Issue Type: Bug
>          Components: Database Core
>            Reporter: Maximillian Dornseif
>
> I am quite sure this is not the same issue as in COUCHDB-193.
> Im trying to replicte a somewhat big database {"doc_count":541394,"doc_del_count":265692,"update_seq":2118390,"purge_seq":0,"compact_running":false,"disk_size":16552608803}
to an other machine. 
> I started replication with this:
> send: 'POST /_replicate HTTP/1.1\r\nHost: couchdb1.local.xxx:5984\r\nAccept-Encoding:
identity\r\ncontent-length: 90\r\ncontent-type: application/json\r\naccept: application/json\r\nuser-agent:
couchdb-python 0.5dev-r127\r\n\r\n'
> send: '{"source": "hulog_events", "target": "http://couchdb2.local.xxx:5984/hulog_events"}'
> reply: ''
> connect: (couchdb1.local.hudora.biz, 5984)
> send: 'POST /_replicate HTTP/1.1\r\nHost: couchdb1.local.xxxx:5984\r\nAccept-Encoding:
identity\r\ncontent-length: 90\r\ncontent-type: application/json\r\naccept: application/json\r\nuser-agent:
couchdb-python 0.5dev-r127\r\n\r\n'
> send: '{"source": "hulog_events", "target": "http://couchdb2.local.xxxx:5984/hulog_events"}'
> (no reply so far)
> On the source server (couchdb1) I see following logentries:
> Mon, 05 Jan 2009 19:34:21 GMT] [info] [<0.12745.45>] 192.168.0.30 - - 'POST' /_replicate
200
> [Mon, 05 Jan 2009 19:35:36 GMT] [info] [<0.107.0>] Compaction for db "hulog_events_test"
completed.
> [Mon, 05 Jan 2009 19:35:45 GMT] [info] [<0.12746.45>] 127.0.0.1 - - 'GET' /hulog_events/
200
> [Mon, 05 Jan 2009 19:35:46 GMT] [info] [<0.95.0>] Compaction for db "eap" completed.
> [Mon, 05 Jan 2009 19:42:17 GMT] [error] [<0.12765.45>] ** Generic server <0.12765.45>
terminating 
> ** Last message in was {'EXIT',<0.12762.45>,
>                         {timeout,
>                          {gen_server,call,
>                           [<0.12768.45>,
>                            {write,
>                             <<0,0,1,36,131,104,2,104,1,108,0,0,0,8,104,2,
>                               109,0,0,0,7,112,114,111,100,117,99,116,109,
>                               0,0,0,8,54,53,49,52,48,47,69,75,104,2,109,0,
>                               0,0,11,116,114,97,110,115,97,99,116,105,111,
>                               110,109,0,0,0,8,114,101,116,114,105,101,118,
>                               101,104,2,109,0,0,0,4,116,121,112,101,109,0,
>                               0,0,4,117,110,105,116,104,2,109,0,0,0,11,97,
>                               114,99,104,105,118,101,100,95,97,116,109,0,
>                               0,0,22,50,48,48,56,48,50,50,50,84,49,50,49,
>                               52,48,53,46,53,50,54,51,56,52,104,2,109,0,0,
>                               0,10,99,114,101,97,116,101,100,95,97,116,
>                               109,0,0,0,22,50,48,48,55,49,49,50,56,84,49,
>                               53,52,50,48,54,46,51,52,52,54,49,56,104,2,
>                               109,0,0,0,4,112,114,111,112,104,1,108,0,0,0,
>                               2,104,2,109,0,0,0,8,108,111,99,97,116,105,
>                               111,110,109,0,0,0,6,65,85,83,76,65,71,104,2,
>                               109,0,0,0,6,104,101,105,103,104,116,98,0,0,
>                               7,158,106,104,2,109,0,0,0,3,109,117,105,109,
>                               0,0,0,18,51,52,48,48,53,57,57,56,49,48,48,
>                               48,48,51,49,50,53,50,104,2,109,0,0,0,8,113,
>                               117,97,110,116,105,116,121,97,11,106,106>>}]}}}
> ** When Server state == {file_descriptor,prim_file,{#Port<0.904761>,24}}
> ** Reason for termination == 
> ** {timeout,{gen_server,call,
>                         [<0.12768.45>,
>                          {write,<<0,0,1,36,131,104,2,104,1,108,0,0,0,8,104,
>                                   2,109,0,0,0,7,112,114,111,100,117,99,116,
>                                   109,0,0,0,8,54,53,49,52,48,47,69,75,104,
>                                   2,109,0,0,0,11,116,114,97,110,115,97,99,
>                                   116,105,111,110,109,0,0,0,8,114,101,116,
>                                   114,105,101,118,101,104,2,109,0,0,0,4,
>                                   116,121,112,101,109,0,0,0,4,117,110,105,
>                                   116,104,2,109,0,0,0,11,97,114,99,104,105,
>                                   118,101,100,95,97,116,109,0,0,0,22,50,48,
>                                   48,56,48,50,50,50,84,49,50,49,52,48,53,
>                                   46,53,50,54,51,56,52,104,2,109,0,0,0,10,
>                                   99,114,101,97,116,101,100,95,97,116,109,
>                                   0,0,0,22,50,48,48,55,49,49,50,56,84,49,
>                                   53,52,50,48,54,46,51,52,52,54,49,56,104,
>                                   2,109,0,0,0,4,112,114,111,112,104,1,108,
>                                   0,0,0,2,104,2,109,0,0,0,8,108,111,99,97,
>                                   116,105,111,110,109,0,0,0,6,65,85,83,76,
>                                   65,71,104,2,109,0,0,0,6,104,101,105,103,
>                                   104,116,98,0,0,7,158,106,104,2,109,0,0,0,
>                                   3,109,117,105,109,0,0,0,18,51,52,48,48,
>                                   53,57,57,56,49,48,48,48,48,51,49,50,53,
>                                   50,104,2,109,0,0,0,8,113,117,97,110,116,
>                                   105,116,121,97,11,106,106>>}]}}
> [Mon, 05 Jan 2009 19:42:57 GMT] [error] [<0.12765.45>] {error_report,<0.22.0>,
>     {<0.12765.45>,crash_report,
>      [[{pid,<0.12765.45>},
>        {registered_name,[]},
>        {error_info,
>            {exit,
>                {timeout,
>                    {gen_server,call,
>                        [<0.12768.45>,
>                         {write,
>                             <<0,0,1,36,131,104,2,104,1,108,0,0,0,8,104,2,
>                               109,0,0,0,7,112,114,111,100,117,99,116,109,0,
>                               0,0,8,54,53,49,52,48,47,69,75,104,2,109,0,0,
>                               0,11,116,114,97,110,115,97,99,116,105,111,
>                               110,109,0,0,0,8,114,101,116,114,105,101,118,
>                               101,104,2,109,0,0,0,4,116,121,112,101,109,0,
>                               0,0,4,117,110,105,116,104,2,109,0,0,0,11,97,
>                               114,99,104,105,118,101,100,95,97,116,109,0,0,
>                               0,22,50,48,48,56,48,50,50,50,84,49,50,49,52,
>                               48,53,46,53,50,54,51,56,52,104,2,109,0,0,0,
>                               10,99,114,101,97,116,101,100,95,97,116,109,0,
>                               0,0,22,50,48,48,55,49,49,50,56,84,49,53,52,
>                               50,48,54,46,51,52,52,54,49,56,104,2,109,0,0,
>                               0,4,112,114,111,112,104,1,108,0,0,0,2,104,2,
>                               109,0,0,0,8,108,111,99,97,116,105,111,110,
>                               109,0,0,0,6,65,85,83,76,65,71,104,2,109,0,0,
>                               0,6,104,101,105,103,104,116,98,0,0,7,158,106,
>                               104,2,109,0,0,0,3,109,117,105,109,0,0,0,18,
>                               51,52,48,48,53,57,57,56,49,48,48,48,48,51,49,
>                               50,53,50,104,2,109,0,0,0,8,113,117,97,110,
>                               116,105,116,121,97,11,106,106>>}]}},
>                [{gen_server,terminate,6},{proc_lib,init_p_do_apply,3}]}},
>        {initial_call,{couch_file,init,['Argument__1']}},
>        {ancestors,[<0.12762.45>]},
>        {messages,[]},
>        {links,[#Port<0.904761>]},
>        {dictionary,[]},
>        {trap_exit,true},
>        {status,running},
>        {heap_size,987},
>        {stack_size,23},
>        {reductions,836156}],
>       []]}}
> [Mon, 05 Jan 2009 19:43:02 GMT] [error] [<0.22399.43>] ** Generic server <0.22399.43>
terminating 
> ** Last message in was {'EXIT',<0.10848.41>,
>                         {timeout,
>                          {gen_server,call,
>                           [<0.12768.45>,
>                            {write,
>                             <<0,0,1,36,131,104,2,104,1,108,0,0,0,8,104,2,
>                               109,0,0,0,7,112,114,111,100,117,99,116,109,
>                               0,0,0,8,54,53,49,52,48,47,69,75,104,2,109,0,
>                               0,0,11,116,114,97,110,115,97,99,116,105,111,
>                               110,109,0,0,0,8,114,101,116,114,105,101,118,
>                               101,104,2,109,0,0,0,4,116,121,112,101,109,0,
>                               0,0,4,117,110,105,116,104,2,109,0,0,0,11,97,
>                               114,99,104,105,118,101,100,95,97,116,109,0,
>                               0,0,22,50,48,48,56,48,50,50,50,84,49,50,49,
>                               52,48,53,46,53,50,54,51,56,52,104,2,109,0,0,
>                               0,10,99,114,101,97,116,101,100,95,97,116,
>                               109,0,0,0,22,50,48,48,55,49,49,50,56,84,49,
>                               53,52,50,48,54,46,51,52,52,54,49,56,104,2,
>                               109,0,0,0,4,112,114,111,112,104,1,108,0,0,0,
>                               2,104,2,109,0,0,0,8,108,111,99,97,116,105,
>                               111,110,109,0,0,0,6,65,85,83,76,65,71,104,2,
>                               109,0,0,0,6,104,101,105,103,104,116,98,0,0,
>                               7,158,106,104,2,109,0,0,0,3,109,117,105,109,
>                               0,0,0,18,51,52,48,48,53,57,57,56,49,48,48,
>                               48,48,51,49,50,53,50,104,2,109,0,0,0,8,113,
>                               117,97,110,116,105,116,121,97,11,106,106>>}]}}}
> ** When Server state == {file_descriptor,prim_file,{#Port<0.904494>,16}}
> ** Reason for termination == 
> ** {timeout,{gen_server,call,
>                         [<0.12768.45>,
>                          {write,<<0,0,1,36,131,104,2,104,1,108,0,0,0,8,104,
>                                   2,109,0,0,0,7,112,114,111,100,117,99,116,
>                                   109,0,0,0,8,54,53,49,52,48,47,69,75,104,
>                                   2,109,0,0,0,11,116,114,97,110,115,97,99,
>                                   116,105,111,110,109,0,0,0,8,114,101,116,
>                                   114,105,101,118,101,104,2,109,0,0,0,4,
>                                   116,121,112,101,109,0,0,0,4,117,110,105,
>                                   116,104,2,109,0,0,0,11,97,114,99,104,105,
>                                   118,101,100,95,97,116,109,0,0,0,22,50,48,
>                                   48,56,48,50,50,50,84,49,50,49,52,48,53,
>                                   46,53,50,54,51,56,52,104,2,109,0,0,0,10,
>                                   99,114,101,97,116,101,100,95,97,116,109,
>                                   0,0,0,22,50,48,48,55,49,49,50,56,84,49,
>                                   53,52,50,48,54,46,51,52,52,54,49,56,104,
>                                   2,109,0,0,0,4,112,114,111,112,104,1,108,
>                                   0,0,0,2,104,2,109,0,0,0,8,108,111,99,97,
>                                   116,105,111,110,109,0,0,0,6,65,85,83,76,
>                                   65,71,104,2,109,0,0,0,6,104,101,105,103,
>                                   104,116,98,0,0,7,158,106,104,2,109,0,0,0,
>                                   3,109,117,105,109,0,0,0,18,51,52,48,48,
>                                   53,57,57,56,49,48,48,48,48,51,49,50,53,
>                                   50,104,2,109,0,0,0,8,113,117,97,110,116,
>                                   105,116,121,97,11,106,106>>}]}}
> [Mon, 05 Jan 2009 19:43:28 GMT] [error] [<0.22399.43>] {error_report,<0.22.0>,
>     {<0.22399.43>,crash_report,
>      [[{pid,<0.22399.43>},
>        {registered_name,[]},
>        {error_info,
>            {exit,
>                {timeout,
>                    {gen_server,call,
>                        [<0.12768.45>,
>                         {write,
>                             <<0,0,1,36,131,104,2,104,1,108,0,0,0,8,104,2,
>                               109,0,0,0,7,112,114,111,100,117,99,116,109,0,
>                               0,0,8,54,53,49,52,48,47,69,75,104,2,109,0,0,
>                               0,11,116,114,97,110,115,97,99,116,105,111,
>                               110,109,0,0,0,8,114,101,116,114,105,101,118,
>                               101,104,2,109,0,0,0,4,116,121,112,101,109,0,
>                               0,0,4,117,110,105,116,104,2,109,0,0,0,11,97,
>                               114,99,104,105,118,101,100,95,97,116,109,0,0,
>                               0,22,50,48,48,56,48,50,50,50,84,49,50,49,52,
>                               48,53,46,53,50,54,51,56,52,104,2,109,0,0,0,
>                               10,99,114,101,97,116,101,100,95,97,116,109,0,
>                               0,0,22,50,48,48,55,49,49,50,56,84,49,53,52,
>                               50,48,54,46,51,52,52,54,49,56,104,2,109,0,0,
>                               0,4,112,114,111,112,104,1,108,0,0,0,2,104,2,
>                               109,0,0,0,8,108,111,99,97,116,105,111,110,
>                               109,0,0,0,6,65,85,83,76,65,71,104,2,109,0,0,
>                               0,6,104,101,105,103,104,116,98,0,0,7,158,106,
>                               104,2,109,0,0,0,3,109,117,105,109,0,0,0,18,
>                               51,52,48,48,53,57,57,56,49,48,48,48,48,51,49,
>                               50,53,50,104,2,109,0,0,0,8,113,117,97,110,
>                               116,105,116,121,97,11,106,106>>}]}},
>                [{gen_server,terminate,6},{proc_lib,init_p_do_apply,3}]}},
>        {initial_call,{couch_file,init,['Argument__1']}},
>        {ancestors,
>            [<0.10848.41>,<0.10847.41>,couch_server,couch_primary_services,
>             couch_server_sup,<0.1.0>]},
>        {messages,
>            [{'DOWN',#Ref<0.0.81.132266>,process,<0.10847.41>,
>                 {timeout,
>                     {gen_server,call,
>                         [<0.12768.45>,
>                          {write,
>                              <<0,0,1,36,131,104,2,104,1,108,0,0,0,8,104,
>                                2,109,0,0,0,7,112,114,111,100,117,99,116,
>                                109,0,0,0,8,54,53,49,52,48,47,69,75,104,
>                                2,109,0,0,0,11,116,114,97,110,115,97,99,
>                                116,105,111,110,109,0,0,0,8,114,101,116,
>                                114,105,101,118,101,104,2,109,0,0,0,4,
>                                116,121,112,101,109,0,0,0,4,117,110,105,
>                                116,104,2,109,0,0,0,11,97,114,99,104,105,
>                                118,101,100,95,97,116,109,0,0,0,22,50,48,
>                                48,56,48,50,50,50,84,49,50,49,52,48,53,
>                                46,53,50,54,51,56,52,104,2,109,0,0,0,10,
>                                99,114,101,97,116,101,100,95,97,116,109,
>                                0,0,0,22,50,48,48,55,49,49,50,56,84,49,
>                                53,52,50,48,54,46,51,52,52,54,49,56,104,
>                                2,109,0,0,0,4,112,114,111,112,104,1,108,
>                                0,0,0,2,104,2,109,0,0,0,8,108,111,99,97,
>                                116,105,111,110,109,0,0,0,6,65,85,83,76,
>                                65,71,104,2,109,0,0,0,6,104,101,105,103,
>                                104,116,98,0,0,7,158,106,104,2,109,0,0,0,
>                                3,109,117,105,109,0,0,0,18,51,52,48,48,
>                                53,57,57,56,49,48,48,48,48,51,49,50,53,
>                                50,104,2,109,0,0,0,8,113,117,97,110,116,
>                                105,116,121,97,11,106,106>>}]}}}]},
>        {links,[#Port<0.904494>]},
>        {dictionary,[{<0.10847.41>,{#Ref<0.0.81.132266>,1}}]},
>        {trap_exit,true},
>        {status,running},
>        {heap_size,987},
>        {stack_size,23},
>        {reductions,5627554}],
>       []]}}
> (and nothing further)
> I still can access couchdb1 (the source) but every trivial request takes exactly 5015ms:
> balancer:/filespace/couchdb/log# time curl -i http://127.0.0.1:5984/
> HTTP/1.1 200 OK
> Server: CouchDB/0.9.0a731357-incubating (Erlang OTP/R12B)
> Date: Mon, 05 Jan 2009 20:45:46 GMT
> Content-Type: text/plain;charset=utf-8
> Content-Length: 102
> Cache-Control: must-revalidate
> {"couchdb":"Welcome","version":"0.9.0a731357-incubating","start_time":"Sun, 04 Jan 2009
21:43:13 GMT"}
> real	0m5.015s
> user	0m0.008s
> sys	0m0.000s
> For these accesses no log entries  on couchdb1 are created.
> Meanwhile on the destination server (couchdb2) I can see lot of activity:
> [Mon, 05 Jan 2009 20:47:58 GMT] [info] [<0.19601.5>] 172.28.4.107 - - 'POST' /hulog_events/_missing_revs
200
> ... 40 lines...
> [Mon, 05 Jan 2009 20:47:58 GMT] [info] [<0.19644.5>] 172.28.4.107 - - 'POST' /hulog_events/_missing_revs
200
> [Mon, 05 Jan 2009 20:48:13 GMT] [info] [<0.19652.5>] 172.28.4.107 - - 'POST' /hulog_events/_missing_revs
200
> ... ca 200 lines
> [Mon, 05 Jan 2009 20:48:13 GMT] [info] [<0.19744.5>] 172.28.4.107 - - 'POST' /hulog_events/_missing_revs
200
> [Mon, 05 Jan 2009 20:48:28 GMT] [info] [<0.19747.5>] 172.28.4.107 - - 'POST' /hulog_events/_missing_revs
200
> ... ca 200 lines
> [Mon, 05 Jan 2009 20:48:28 GMT] [info] [<0.19844.5>] 172.28.4.107 - - 'POST' /hulog_events/_missing_revs
200
> [Mon, 05 Jan 2009 20:48:43 GMT] [info] [<0.19944.5>] 172.28.4.107 - - 'POST' /hulog_events/_missing_revs
200
> ... ca 200 lines
> [Mon, 05 Jan 2009 20:48:58 GMT] [info] [<0.19948.5>] 172.28.4.107 - - 'POST' /hulog_events/_missing_revs
200
> ... ca 200 lines
> [Mon, 05 Jan 2009 20:48:58 GMT] [info] [<0.20044.5>] 172.28.4.107 - - 'POST' /hulog_events/_missing_revs
200
> [Mon, 05 Jan 2009 20:49:13 GMT] [info] [<0.20045.5>] 172.28.4.107 - - 'POST' /hulog_events/_missing_revs
200
> But the number of documents on the destination servers hasnt been incerasing in the meantime:
> {"db_name":"hulog_events","doc_count":25926,"doc_del_count":10074,"update_seq":36000,"purge_seq":0,"compact_running":false,"disk_size":21927524}
> couchdb1 is CouchDB 0.9.0a731357-incubating
> couchdb2 is CouchDB 0.9.0a730405-incubating

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