Problems with ArcSDE & MapServer (Premature end of script headers)
Shim, Stephen
Stephen.Shim at CA.COM
Mon Feb 19 16:29:37 PST 2007
Hi,
I just used GDB to get more debugging output, I ran the shp2img program under GDB.
The Seg Fault occurs when MapServer is trying to close the ArcSDE Layer.
During this closing, its trying to free up data in an array, using msFree() and this causes the Segmentation Fault,
Does anyone have any idea what this problem means?
BTW, thanks to David for responding.
I've tried your suggestion but its still Seg Faulting.
Here's the output:
msLayerClose (layer=0x8935288) at maplayer.c:234
234 msLayerFreeItemInfo(layer);
(gdb)
232 {
(gdb)
234 msLayerFreeItemInfo(layer);
(gdb)
msLayerFreeItemInfo (layer=0x8935288) at maplayer.c:120
120 if ( ! layer->vtable) {
(gdb)
119 {
(gdb)
120 if ( ! layer->vtable) {
(gdb)
125 layer->vtable->LayerFreeItemInfo(layer);
(gdb)
msSDELayerFreeItemInfo (layer=0x8935288) at mapsde.c:1720
1720 if(layer->iteminfo) {
(gdb)
1718 {
(gdb)
1720 if(layer->iteminfo) {
(gdb)
1721 SE_table_free_descriptions((SE_COLUMN_DEF *)layer->iteminfo);
(gdb)
1722 layer->iteminfo = NULL;
(gdb)
1729 }
(gdb)
msLayerFreeItemInfo (layer=0x8935288) at maplayer.c:126
126 }
(gdb)
msLayerClose (layer=0x8935288) at maplayer.c:235
235 if(layer->items) {
(gdb)
236 msFreeCharArray(layer->items, layer->numitems);
(gdb)
msFreeCharArray (array=0x8a97308, num_items=2) at mapfile.c:269
269 if((num_items < 0) || !array) return;
(gdb)
271 for(i=0;i<num_items;i++)
(gdb)
272 msFree(array[i]);
(gdb)
msFree (p=0x80f862b) at mapfile.c:259
259 if(p) free(p);
(gdb)
Program received signal SIGSEGV, Segmentation fault.
0x07936fc0 in free () from /lib/tls/libc.so.6
(gdb)
Stephen Shim
SLIP Team
Email: Stephen.Shim at ca.com
CA Phone: 9488 8193
________________________________
From: UMN MapServer Users List on behalf of Shim, Stephen
Sent: Fri 16/02/2007 3:45 PM
To: MAPSERVER-USERS at LISTS.UMN.EDU
Subject: [UMN_MAPSERVER-USERS] Problems with ArcSDE & MapServer (Premature end of script headers)
Hi,
I have a problem with MapServer connecting to our ArcSDE server.
The error logs show a "Premature end of script headers" error.
I'm using MapServer 4.8.4 and have tried 4.10.0, which also returns the same error.
Previously, I used MapServer 4.6.2 and have had no problems connecting to ArcSDE.
In all three cases (MapServer 4.8.4, 4.10.0 and 4.6.2), I used the same mapfile.
The different versions of MapServer were compiled with ArcSDE support
using the maptools.org "fgs" toolkit on Red Hat Linux servers.
If you have used MapServer 4.8.4 or 4.10.0 connecting to ArcSDE on Red Hat Linux successfully,
I'd like to hear from you.
ENVIRONMENT
We have the MapServer running on a Linux box and ArcSDE running on a Windows box.
MapServer Server:
* MapServer 4.8.4
* Red Hat ES4
ArcSDE Server:
* Windows 2003 Server.
* ArcSDE 9.1 (Release: 91003) [BugFix: 0]
* Oracle9i Build 1269
ERROR LOGS:
I turned on error logging in MapServer and here are the results:
Debug Information from MapServer 4.8.4
[Thu Feb 15 15:31:57 2007].578336 msWMSLoadGetMapParams(): enabling non-square pixels.
[Thu Feb 15 15:31:57 2007].590997 msDrawMap(): kicking into non-square pixel preserving mode.
[Thu Feb 15 15:31:57 2007].591072 msSDELayerOpen(): Layer CALM_REGIONS opened from scratch.
[Thu Feb 15 15:31:58 2007].119776 msConnPoolRegister(CALM_REGIONS,sliptest,port:5151,slip,sde,aslkzxmn,0x93d5ab8)
[Thu Feb 15 15:31:58 2007].119834 msSDELayerOpen(): Layer CALM_REGIONS specified version SDE.DEFAULT.
[Thu Feb 15 15:31:58 2007].121464 msSDEGetLayerInfo(): Looking for layer by SDE.CALM_REGIONS, SHAPE, sliptest,port:5151,slip,sde,aslkzxmn
[Thu Feb 15 15:31:58 2007].121516 msSDEGetLayerInfo(): No cached layerid found.
[Thu Feb 15 15:31:58 2007].123143 msSDELCacheAdd(): Caching id for SDE.CALM_REGIONS, SHAPE, sliptest,port:5151,slip,sde,aslkzxmn
[Thu Feb 15 15:31:58 2007].124391 msSDELayerGetRowIDColumn(): Table was not registered, returning SE_ROW_ID.
[Thu Feb 15 15:31:58 2007].124620 msSDELayerGetRowIDColumn(): Table was not registered, returning SE_ROW_ID.
[Thu Feb 15 15:31:58 2007] [error] [client 172.20.249.52] Premature end of script headers: /MapServer410/www/cgi-bin/mapserv
On MapServer 4.6.2, which succeeded in returning an image, I also obtained debugging information to compare:
Debug Information from MapServer 4.6.2
[Fri Feb 16 13:13:41 2007].3009 msWMSLoadGetMapParams(): enabling non-square pixels.
[Fri Feb 16 13:13:41 2007].12309 msDrawMap(): kicking into non-square pixel preserving mode.
[Fri Feb 16 13:13:41 2007].12389 msSDELayerOpen(): Layer CALM_REGIONS opened from scratch.
[Fri Feb 16 13:13:41 2007].571953 msConnPoolRegister(CALM_REGIONS,sliptest,port:5151,slip,sde,aslkzxmn,0x82d1000)
[Fri Feb 16 13:13:41 2007].572006 msSDELayerOpen(): Layer CALM_REGIONS specified version SDE.DEFAULT.
[Fri Feb 16 13:13:41 2007].586505 msSDEGetLayerInfo(): Looking for layer by SDE.CALM_REGIONS, SHAPE, sliptest,port:5151,slip,sde,aslkzxmn
[Fri Feb 16 13:13:41 2007].586526 msSDEGetLayerInfo(): No cached layerid found.
[Fri Feb 16 13:13:41 2007].593036 msSDELCacheAdd(): Caching id for SDE.CALM_REGIONS, SHAPE, sliptest,port:5151,slip,sde,aslkzxmn
[Fri Feb 16 13:13:41 2007].594426 msSDELayerGetRowIDColumn(): Table was not registered, returning SE_ROW_ID.
[Fri Feb 16 13:13:41 2007].594652 msSDELayerGetRowIDColumn(): Table was not registered, returning SE_ROW_ID.
[Fri Feb 16 13:13:41 2007].729126 msDrawMap(): Layer 1 (CALM_REGIONS), 0.717s
[Fri Feb 16 13:13:41 2007].729202 msDrawMap(): Drawing Label Cache, 0.000s
[Fri Feb 16 13:13:41 2007].729233 msDrawMap() total time: 0.717s
[Fri Feb 16 13:13:41 2007].732874 msPOSTGISLayerClose datastatement: the_geom from cadastre
[Fri Feb 16 13:13:41 2007].732905 msPOSTGISLayerClose -- layerinfo is NULL
[Fri Feb 16 13:13:41 2007].732923 msSDELayerClose(): Closing layer CALM_REGIONS.
[Fri Feb 16 13:13:41 2007].732962 msConnPoolRelease(CALM_REGIONS,sliptest,port:5151,slip,sde,aslkzxmn,0x82d1000)
[Fri Feb 16 13:13:41 2007].732983 msConnPoolClose(sliptest,port:5151,slip,sde,aslkzxmn,0x82d1000)
Here is the mapfile LAYER definition that we tried connecting.
LAYER
NAME "CALM_REGIONS"
CONNECTION "sliptest,port:5151,slip,sde,aslkzxmn"
CONNECTIONTYPE SDE
DATA "SDE.CALM_REGIONS,SHAPE,SDE.DEFAULT"
DEBUG ON
STATUS ON
GROUP "CALM"
DUMP true #required for wfs
TYPE polygon
TEMPLATE 'demo.html'
METADATA
"wms_title" "CALM - CALM Regions"
"wms_srs" "EPSG:4283 EPSG:4326 EPSG:28349 EPSG:28350 EPSG:28351 EPSG:28352"
"wms_extent" "112.866 -35.2419 129.001 -13.5101"
"wms_group_title" "CALM"
"gml_include_items" "all" ## optional (serves all attributes for layer)
END #METADATA
PROJECTION
"init=epsg:4283"
END
CLASS
NAME 'CALM_Regions'
STYLE
SYMBOL "line-vertical"
COLOR 0 0 255
OUTLINECOLOR 0 0 0
SIZE 5
END #STYLE
STYLE
SYMBOL "line-horizontal"
COLOR 0 0 255
OUTLINECOLOR 0 0 0
SIZE 5
END #STYLE
END #CLASS
END #LAYER
I would greatly appreciate it if anyone can offer any help in this matter.
Sincerely,
Stephen Shim
SLIP Team
Email: Stephen.Shim at ca.com <mailto:Stephen.Shim at ca.com>
CA Phone: 9488 8193
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