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From bugzi...@apache.org
Subject [Bug 53321] New: worker name cannot be used in work er list if also used in loadbalancer. throws 503 error
Date Tue, 29 May 2012 17:11:31 GMT
https://issues.apache.org/bugzilla/show_bug.cgi?id=53321

          Priority: P2
            Bug ID: 53321
          Assignee: dev@tomcat.apache.org
           Summary: worker name cannot be used in work er list if also
                    used in loadbalancer. throws 503 error
          Severity: regression
    Classification: Unclassified
                OS: Linux
          Reporter: abiacco@formatdynamics.com
          Hardware: PC
            Status: NEW
           Version: 1.2.36
         Component: mod_jk
           Product: Tomcat Connectors

Bug being added per request from mturk

Centos 5.8, x86_64, apache 2.2.22, java 1.6.0_32, tomcat 7.0.27, apr
1.4.6 (also happens on another machine with apache 2.2.21 and java
1.6.0_29, rest of the versions are the same)

Connecting apache to tomcat ajp, same machine.
Once I upgraded to 1.2.36 I started receiving 503 errors when trying to
access my webapps through the loadbalancer worker.
1.2.32 and 1.2.35 work fine.
Will work if the worker (app-03) is removed from worker.list (config below)

Jk log shows:
[Wed May 23 15:56:32 2012] [32504:1138178368] [debug]
ajp_get_endpoint::jk_ajp_common.c (3154): acquired connection pool
slot=0 after 0 retries
[Wed May 23 15:56:32 2012] [32504:1138178368] [debug]
ajp_marshal_into_msgb::jk_ajp_common.c (626): ajp marshaling done
[Wed May 23 15:56:32 2012] [32504:1138178368] [debug]
ajp_service::jk_ajp_common.c (2449): processing app-03 with 2 retries
[Wed May 23 15:56:32 2012] [32504:1138178368] [debug]
ajp_send_request::jk_ajp_common.c (1623): (app-03) all endpoints are
disconnected.
[Wed May 23 15:56:32 2012] [32504:1138178368] [debug]
jk_open_socket::jk_connect.c (485): socket TCP_NODELAY set to On
[Wed May 23 15:56:32 2012] [32504:1138178368] [debug]
jk_open_socket::jk_connect.c (574): timeout 20 set for socket=22
[Wed May 23 15:56:32 2012] [32504:1138178368] [debug]
jk_open_socket::jk_connect.c (609): trying to connect socket 22 to
0.0.0.0:0
[Wed May 23 15:56:32 2012] [32504:1138178368] [debug]
jk_open_socket::jk_connect.c (635): socket 22 [errno=107] connected
[Wed May 23 15:56:32 2012] [32504:1138178368] [debug]
ajp_connection_tcp_send_message::jk_ajp_common.c (1183): sending to
ajp13 pos=4 len=5 max=16
[Wed May 23 15:56:32 2012] [32504:1138178368] [debug]
ajp_connection_tcp_send_message::jk_ajp_common.c (1183): 0000    12 34
00 01 0A 00 00 00 00 00 00 00 00 00 00 00  - .4..............
[Wed May 23 15:56:32 2012] [32504:1138178368] [debug]
jk_shutdown_socket::jk_connect.c (732): About to shutdown socket 22
[errno=107]
[Wed May 23 15:56:32 2012] [32504:1138178368] [debug]
jk_shutdown_socket::jk_connect.c (741): Failed sending SHUT_WR for
socket 22 [errno=107]
[Wed May 23 15:56:32 2012] [32504:1138178368] [info]
ajp_connection_tcp_send_message::jk_ajp_common.c (1215): sendfull for
socket 22 returned -32 (errno=32)
[Wed May 23 15:56:32 2012] [32504:1138178368] [info]
ajp_handle_cping_cpong::jk_ajp_common.c (902): can't send cping query
[Wed May 23 15:56:32 2012] [32504:1138178368] [error]
ajp_connect_to_endpoint::jk_ajp_common.c (1026): (app-03) cping/cpong
after connecting to the backend server failed (errno=32)
[Wed May 23 15:56:32 2012] [32504:1138178368] [error]
ajp_send_request::jk_ajp_common.c (1629): (app-03) connecting to backend
failed. Tomcat is probably not started or is listening on the wrong port
(errno=32)
[Wed May 23 15:56:32 2012] [32504:1138178368] [info]
ajp_service::jk_ajp_common.c (2622): (app-03) sending request to tomcat
failed (recoverable), because of error during request sending
(attempt=1)

httpd.conf settings are:

JkWorkersFile /path/to/workers.properties
JkWatchdogInterval 60
JkLogFile     /path/to/GLOBAL-mod_jk.log
JkLogLevel    debug
JkLogStampFormat "[%a %b %d %H:%M:%S %Y] "
JkOptions +ForwardKeySize +ForwardURIProxy -ForwardDirectories
JkRequestLogFormat "%w %R %V %B %T %m %U %s"
JkShmFile logs/jk-runtime-status
JkMount /webapp/* loadbalancer

workers.properties settings are:

worker.list=jkstatus,app-03,loadbalancer
worker.template.port=8009
worker.template.type=ajp13
worker.template.lbfactor=1
worker.template.connection_pool_timeout=30
worker.template.connect_timeout=30000
worker.template.recovery_options=4
worker.template.reply_timeout=31000
worker.template.socket_timeout=20
worker.template.socket_connect_timeout=5000
worker.template.ping_mode=A
worker.template.ping_timeout=20000
worker.app-03.host=127.0.0.1
worker.app-03.reference=worker.template
worker.jkstatus.type=status
worker.loadbalancer.sticky_session=1
worker.loadbalancer.type=lb
worker.loadbalancer.balance_workers=app-03

server.xml settings are:

        <Connector port="8009" protocol="AJP/1.3"
                        maxThreads="1000" backlog="25"
maxPostSize="4194304"
                        enableLookups="false" connectionTimeout="30000"
keepAliveTimeout="10000"
                        redirectPort="8443" />

# netstat -anop | grep 8009
tcp        0      0 0.0.0.0:8009                0.0.0.0:*
LISTEN      30151/jsvc.exec     off (0.00/0/0)

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