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From "Christopher O'Connell (JIRA)" <j...@apache.org>
Subject [jira] Created: (COUCHDB-551) couch_log crashes on external process return
Date Mon, 02 Nov 2009 00:06:59 GMT
couch_log crashes on external process return
--------------------------------------------

                 Key: COUCHDB-551
                 URL: https://issues.apache.org/jira/browse/COUCHDB-551
             Project: CouchDB
          Issue Type: Bug
          Components: Infrastructure
    Affects Versions: 0.10.1
         Environment: CentOS 5.3, Erlang R12
            Reporter: Christopher O'Connell
            Priority: Minor
             Fix For: 0.10.1


When an external process returns a value, the couch_log process crashes.

A couchdb external process is created which returns well formed json as identified below.
Whenever the process' url is accessed, couchdb correctly returns the result, however, the
couch_log process crashes (log below).

To replicate this, setup an external process and make a call to it using the mapped url.

This has been observed on CentOS 5.3 with the most recent version of the 0.10 branch, using
a java external process as described below. Similar behavior has also been observed on Ubuntu
9.10 using a php external process (log not included).

External Program Input: { "path":[],"query":{"hello":"world","abc":123},"verb":"GET" }
External Program Output: {"headers":{"content-type":"text/plain"},"json":{"hello":"world","abc":123},"code":"200"}
Couchdb URL: .../_exj?hello=world&abc=123
Couchdb Response: {"hello":"world","abc":"123"}
***** Log *****
Apache CouchDB 0.10.0 (LogLevel=info) is starting.
Apache CouchDB has started. Time to relax.
[info] [<0.1.0>] Apache CouchDB has started on http://127.0.0.1:5984/
[info] [<0.73.0>] EXTERNAL: Starting process for: exj
[info] [<0.73.0>] COMMAND: /usr/bin/java -cp /root/geoc externalj

=ERROR REPORT==== 1-Nov-2009::23:44:24 ===
** gen_event handler couch_log crashed.
** Was installed in error_logger
** Last event was: {info_report,<0.22.0>,
                                {<0.60.0>,couch_info,
                                 {"~s - - ~p ~s ~B",
                                  ["72.211.148.58",'GET',
                                   "/airport_data/_exj?hello=world&abc=123",
                                   <<"200">>]}}}
** When handler state == {<0.46.0>,2}
** Reason == {badarg,[{io_lib,format,
                              ["~s - - ~p ~s ~B",
                               ["72.211.148.58",'GET',
                                "/airport_data/_exj?hello=world&abc=123",
                                <<"200">>]]},
                      {couch_log,log,5},
                      {couch_log,handle_event,2},
                      {gen_event,server_update,4},
                      {gen_event,server_notify,4},
                      {gen_event,handle_msg,5},
                      {proc_lib,init_p_do_apply,3}]}

=ERROR REPORT==== 1-Nov-2009::23:44:24 ===
** Generic server couch_log terminating
** Last message in was {gen_event_EXIT,couch_log,
                        {'EXIT',
                         {badarg,
                          [{io_lib,format,
                            ["~s - - ~p ~s ~B",
                             ["72.211.148.58",'GET',
                              "/airport_data/_exj?hello=world&abc=123",
                              <<"200">>]]},
                           {couch_log,log,5},
                           {couch_log,handle_event,2},
                           {gen_event,server_update,4},
                           {gen_event,server_notify,4},
                           {gen_event,handle_msg,5},
                           {proc_lib,init_p_do_apply,3}]}}}
** When Server state == {error_logger,couch_log}
** Reason for termination ==
** {'EXIT',{badarg,[{io_lib,format,
                            ["~s - - ~p ~s ~B",
                             ["72.211.148.58",'GET',
                              "/airport_data/_exj?hello=world&abc=123",
                              <<"200">>]]},
                    {couch_log,log,5},
                    {couch_log,handle_event,2},
                    {gen_event,server_update,4},
                    {gen_event,server_notify,4},
                    {gen_event,handle_msg,5},
                    {proc_lib,init_p_do_apply,3}]}}

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