Well not a whisper of interest in this bug, but I have found a workaround at least. HP distribute a package which includes Apache 2 and mod_jk evidently with the bug fixed. It does mean porting our site to Apache 2 but this is less of an effort than tracking down this bug.
If anybody else has this problem you could at least point them to that as a workaround. I have abandoned my efforts to fix the bug in the code now, I can't justify it at work anymore, and there doesn't seem to be much interest in it here either. Bruce Ashton Java Developer Internet Application Development The Met Office http://www.metoffice.com/ ext. 4560 > -----Original Message----- > From: Ashton, Bruce > Sent: Monday, May 27, 2002 3:49 PM > To: '[EMAIL PROTECTED]' > Subject: large requests crash mod_jk on HP-UX 11.0 > > I am really a tomcat user, but I have ended up trolling through the mod_jk > code looking for this bug, so I thought this was the appropriate place to > post my discoveries; > > > Background: > Our Unix team have built Apache from the source for HP-UX 11.0 with the HP > cc compiler, not gcc. > cpp and ccom versions are A.11.01.00, ld version is B.11.25 > mod_jk has been built with the same compiler using apxs and the > build-hpux-cc.sh script. > Apache is version 1.3.22. > The mod_jk source comes from the file > jakarta-tomcat-connectors-4.0.2-01-src.zip from the Jakarta site. > > > The problem: > Mostly this build works except: certain URL's on our site fail with an > "internal server error" message to the browser. The request doesn't show > up in Apache's access log. > > The following shows up in Apache's error log: > > [Mon May 27 14:07:01 2002] [notice] child pid 13574 exit signal > Segmentation fault (11) > [Mon May 27 14:07:01 2002] [notice] child pid 12572 exit signal > Segmentation fault (11) > > always two lines. > > With JkLogLevel set to debug, the following shows up in the mod_jk log: > > [Mon May 27 14:07:01 2002] [jk_uri_worker_map.c (447)]: Into > jk_uri_worker_map_t::map_uri_to_worker > [Mon May 27 14:07:01 2002] [jk_uri_worker_map.c (464)]: Attempting to map > URI '/openroadTextFC.do' > [Mon May 27 14:07:01 2002] [jk_uri_worker_map.c (529)]: > jk_uri_worker_map_t::map_uri_to_worker, Found a suffix match web -> *.do > [Mon May 27 14:07:01 2002] [jk_uri_worker_map.c (447)]: Into > jk_uri_worker_map_t::map_uri_to_worker > [Mon May 27 14:07:01 2002] [jk_uri_worker_map.c (464)]: Attempting to map > URI '/openroadTextFC.do' > [Mon May 27 14:07:01 2002] [jk_uri_worker_map.c (529)]: > jk_uri_worker_map_t::map_uri_to_worker, Found a suffix match web -> *.do > > > I add some extra debugging myself and ascertained that jk_translate runs > through to completion, but no debugging code in jk_handler ever gets run. > If jk_handler is entered at all it must fail at line 1075, "const char > *worker_name = ap_table_get(r->notes, JK_WORKER_ID);" > > I've kind of shied away from trying to debug through apache. I didn't do > the original build anyway. > > For any given URL that fails, it is possible to make it work again by > making the URL *SHORTER*. This is possible if there is extraneous crap in > the query string, which you can cut out. I have discovered that for a > particular page (any one bad page will fail consistently) There will be a > particular length of URL: An 86 character URL may work say, but an 87 > character URL will fail. The useable length of URL will vary from page to > page though, and I haven't seen any other pattern in it. > My speculation is that it's the size of the request object or something, > of which the URL is only a component. A bit woolly I admit, but it's all > I've got. > > Part of my problem is that I don't really know in what order Apache calls > methods from mod_jk, so I don't know if any other part of mod_jk is being > run between jk_translate and jk_handler. > I also don't know that it isn't Apache code that is falling over instead > of mod_jk code. > Also IANACP (I Am Not A C Programmer) - not really anyway. Mostly Java, > and I've just started dabbling in C in incidental ways such as this. > And I'm new to HP-UX as well. > > Can anyone maybe shed a little light on the Apache/mod_jk interface for > me? A bit of a rundown on the order in which the methods are called would > be useful. Also is there any Apache API or mod_jk API documentation > online which I might not be aware of. And if anyone tells me that I need > to start hacking the Apache code, I'll be very depressed. > > Thanks in advance, > > > > Bruce Ashton > Java Developer > Internet Application Development > The Met Office http://www.metoffice.com/ > ext. 4560 > -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
