[mapserver-users] Very strange problem doing a query and hanging on MS 6.4.1
Stephen Woodbridge
woodbri at swoodbridge.com
Wed Jul 15 06:43:14 PDT 2015
On 7/14/2015 4:09 PM, Lime, Steve D (MNIT) wrote:
> I think the map->query.maxfeatures is pretty much settable only
> through WFS. If you're using the template driver output format you
> can limit the number of features that way. You'd use the limit
> property of the feature tag.
>
> That said, it seems to me that you'd want to use TOLERANCE 0 with
> whatever units you like. That means just grabbing the value of the
> pixel the "click" falls in so you'd only ever get one value back.
Steve,
Thanks! From my limited test cases, setting TOLERANCE 0 seems to give me
the old behavior. I updated #5129 to reflect this and this should save
me a bunch of time tweaking scripts and mapfiles.
Thanks again,
-Steve W
> Steve
>
> -----Original Message----- From:
> mapserver-users-bounces at lists.osgeo.org
> [mailto:mapserver-users-bounces at lists.osgeo.org] On Behalf Of Stephen
> Woodbridge Sent: Tuesday, July 14, 2015 2:49 PM To: thomas bonfort
> Cc: MapserverList OSGEO Subject: Re: [mapserver-users] Very strange
> problem doing a query and hanging on MS 6.4.1
>
> Ans not related to apache, I can still reproduce this at the
> commandline, although it is harder to find a case that fails now that
> I have set TOLERANCE and TOLERANCEUNITS.
>
> Is there a way to limit the number of features like MAXFEATURES for
> drawing, only for queries?
>
> I see in the code map->query.maxfeatures but I'm not finding a way
> to set that via CGI or mapfile?
>
> -Steve
>
> On 7/14/2015 11:20 AM, Stephen Woodbridge wrote:
>> OK, not totally solved! Things are better by explicitly setting
>> TOLERANCE and TOLERANCEUNITS but I am still getting random hanging
>> of processes doing queries.
>>
>> I'm wondering if this is related to apache 2.4 and the way it is
>> setting up cgi-bin processes. What is the best practice for
>> configuring apache 2.4 (things changed in apache 2.4 from 2.2) cgi
>> for use with mapserver?
>>
>> I'm running Ubuntu 14.04 LTS and have these packages installed:
>>
>> apache2:amd64/trusty-security 2.4.7-1ubuntu4.4 uptodate
>> apache2-bin:amd64/trusty-security 2.4.7-1ubuntu4.4 uptodate
>> apache2-data:all/trusty-security 2.4.7-1ubuntu4.4 uptodate
>> apache2-mpm-prefork:amd64/trusty-security 2.4.7-1ubuntu4.4
>> uptodate apache2-utils:amd64/trusty-security 2.4.7-1ubuntu4.4
>> uptodate libapache2-mod-geoip:amd64/trusty 1.2.8-2 uptodate
>> libapache2-mod-mapcache:amd64/trusty 1.2.1-2 uptodate
>> libapache2-mod-php5:amd64/trusty-security 5.5.9+dfsg-1ubuntu4.11
>> uptodate libapache2-mod-python:amd64/trusty 3.3.1-11ubuntu2
>> uptodate
>>
>> cgi-mapserver:amd64/trusty 6.4.1-2 uptodate
>> libmapserver1:amd64/trusty 6.4.1-2 uptodate
>> mapserver-bin:amd64/trusty 6.4.1-2 uptodate
>>
>> ls /etc/apache2/mods-enabled/ access_compat.load autoindex.load
>> geoip.load php5.conf alias.load cgi.load
>> mapcache.conf php5.load auth_basic.load deflate.conf
>> mapcache.load python.load authn_core.load deflate.load
>> mime.conf setenvif.conf authn_file.load dir.conf
>> mime.load setenvif.load authz_core.load dir.load
>> mpm_prefork.conf status.conf authz_host.load env.load
>> mpm_prefork.load status.load authz_user.load filter.load
>> negotiation.conf autoindex.conf geoip.conf
>> negotiation.load
>>
>>
>> On 7/13/2015 11:48 AM, Stephen Woodbridge wrote:
>>> SOLVED: see below ...
>>>
>>> According to the docs, the defaults are:
>>>
>>> TOLERANCE 3 TOLERANCEUNITS pixels
>>>
>>> and with:
>>>
>>> QUERY_STRING='map=/maps/wms/bathymetry.map&mode=query&layers=model_query&mapxy=-100.98125+41.58125'
>>>
>>>
>>>
>>>
>>>
How is zoom calculated?
>>>
>>> LAYER NAME "model_query" STATUS on TYPE raster
>>>
>>> TILEINDEX "NOAA_Coastal_Relief_Model/index.shp" TILEITEM
>>> "LOCATION" CLASS TEMPLATE "/maps/wms/pixel.value.html" END END
>>>
>>> Did this behavior change from 6.2.1 to 6.4.1? because it is not
>>> noted in the MIGRATION-GUIDE if it did. On 6.2.1 I get the
>>> following result:
>>>
>>> Content-Type: text/html <HTML <HEAD><TITLE>MapServer
>>> Message</TITLE></HEAD <!-- MapServer version 6.2.1 OUTPUT=GIF
>>> OUTPUT=PNG OUTPUT=JPEG SUPPORTS=PROJ SUPPORTS=GD SUPPORTS=AGG
>>> SUPPORTS=FREETYPE SUPPORTS=CAIRO SUPPORTS=SVG_SYMBOLS
>>> SUPPORTS=ICONV SUPPORTS=FRIBIDI SUPPORTS=WMS_SERVER
>>> SUPPORTS=WMS_CLIENT SUPPORTS=WFS_SERVER SUPPORTS=WFS_CLIENT
>>> SUPPORTS=WCS_SERVER SUPPORTS=SOS_SERVER SUPPORTS=FASTCGI
>>> SUPPORTS=THREADS SUPPORTS=GEOS INPUT=JPEG INPUT=POSTGIS
>>> INPUT=OGR INPUT=GDAL INPUT=SHAPEFILE --> <BODY BGCOLOR="#FFFFFF"
>>> msQueryByPoint(): Search returned no results. No matching
>>> record(s) found. </BODY></HTML>
>>>
>>> which returns very quickly.
>>>
>>> I rsynced the data and the mapfile for Ubuntu 12.04 to 14.04 and
>>> installed the mapserver package. Everything else appears to be
>>> working without a problem except this issue.
>>>
>>> SOLVED:
>>>
>>> I explicitly added:
>>>
>>> TOLERANCE 1 TOLERANCEUNITS pixels
>>>
>>> to my LAYER definition and now it works.
>>>
>>> d# /usr/lib/cgi-bin/mapserv
>>> QUERY_STRING='map=/maps/wms/bathymetry.map&mode=query&layers=model_query&mapxy=-100.98125+41.58125'
>>>
>>>
>>>
>>>
Content-Type: text/html
>>>
>>> <HTML> <HEAD><TITLE>MapServer Message</TITLE></HEAD> <!--
>>> MapServer version 6.4.1 OUTPUT=GIF OUTPUT=PNG OUTPUT=JPEG
>>> OUTPUT=KML SUPPORTS=PROJ SUPPORTS=GD SUPPORTS=AGG
>>> SUPPORTS=FREETYPE SUPPORTS=CAIRO SUPPORTS=SVG_SYMBOLS
>>> SUPPORTS=RSVG SUPPORTS=ICONV SUPPORTS=FRIBIDI SUPPORTS=WMS_SERVER
>>> SUPPORTS=WMS_CLIENT SUPPORTS=WFS_SERVER SUPPORTS=WFS_CLIENT
>>> SUPPORTS=WCS_SERVER SUPPORTS=SOS_SERVER SUPPORTS=FASTCGI
>>> SUPPORTS=THREADS SUPPORTS=GEOS INPUT=JPEG INPUT=POSTGIS INPUT=OGR
>>> INPUT=GDAL INPUT=SHAPEFILE --> <BODY BGCOLOR="#FFFFFF">
>>> msQueryByPoint(): Search returned no results. No matching
>>> record(s) found. </BODY></HTML>
>>>
>>> So it looks like maybe the defaults are not getting initialized.
>>>
>>> Opened: https://github.com/mapserver/mapserver/issues/5120
>>>
>>> Thanks, -Steve
>>>
>>> On 7/13/2015 11:05 AM, thomas bonfort wrote:
>>>> Or that could just be the number of pixels under the query
>>>> point if you are zoomed out far or with a large tolerance...
>>>>
>>>> On 13 July 2015 at 17:01, Stephen Woodbridge
>>>> <woodbri at swoodbridge.com> wrote:
>>>>> Thomas,
>>>>>
>>>>> More information:
>>>>>
>>>>> /u/software/mapserver-rel-6-4-2/maptemplate.c:4366
>>>>>
>>>>> 4366 for(j=0; j<lp->resultcache->numresults; j++) {
>>>>> (gdb) p lp->resultcache->numresults $7 = 2884991
>>>>>
>>>>> this is clearly a bad value my guess is that it is not
>>>>> getting initialized to zero and assumes it will get set when
>>>>> some number of results are found, but if no results are found
>>>>> it is not getting set to zero. (Just a hypothesis)
>>>>>
>>>>> -Steve W
>>>>>
>>>>>
>>>>> On 7/13/2015 10:41 AM, Stephen Woodbridge wrote:
>>>>>>
>>>>>> Thomas,
>>>>>>
>>>>>> Here is the initial backtrace afte starting it and and ^C
>>>>>> while it is printing -99999 lines:
>>>>>>
>>>>>> #0 processLine (mapserv=0x609050, instr=0x7fffffffcc60
>>>>>> "[value_0]\n", stream=0x688460, mode=9) at
>>>>>> /u/software/mapserver-rel-6-4-2/maptemplate.c:3697 #1
>>>>>> 0x00007ffff7a2e9cc in msReturnPage (mapserv=0x609050,
>>>>>> html=0x6612e0 "/maps/wms/pixel.value.html", mode=9,
>>>>>> papszBuffer=0x0) at
>>>>>> /u/software/mapserver-rel-6-4-2/maptemplate.c:4159 #2
>>>>>> 0x00007ffff7a2f7ed in msReturnNestedTemplateQuery
>>>>>> (mapserv=0x609050, pszMimeType=0x60c8f0 "text/html",
>>>>>> papszBuffer=0x0) at
>>>>>> /u/software/mapserver-rel-6-4-2/maptemplate.c:4385 #3
>>>>>> 0x00007ffff7a1f586 in msReturnTemplateQuery
>>>>>> (mapserv=0x609050, queryFormat=0x60c8f0 "text/html",
>>>>>> papszBuffer=0x0) at
>>>>>> /u/software/mapserver-rel-6-4-2/maptemplate.c:315 #4
>>>>>> 0x00007ffff79f1230 in msCGIDispatchQueryRequest
>>>>>> (mapserv=0x609050) at
>>>>>> /u/software/mapserver-rel-6-4-2/mapservutil.c:1476 #5
>>>>>> 0x00007ffff79f2205 in msCGIDispatchRequest
>>>>>> (mapserv=0x609050) at
>>>>>> /u/software/mapserver-rel-6-4-2/mapservutil.c:1784 #6
>>>>>> 0x000000000040115b in main (argc=2, argv=0x7fffffffdf98) at
>>>>>> /u/software/mapserver-rel-6-4-2/mapserv.c:259
>>>>>>
>>>>>> I'll poke around a little more in gdb and see if I can
>>>>>> figure out anything more.
>>>>>>
>>>>>> Thanks, -Steve
>>>>>>
>>>>>>
>>>>>> On 7/13/2015 4:12 AM, thomas bonfort wrote:
>>>>>>>
>>>>>>> Steve, please include a backtrace from gdb where you
>>>>>>> believe the infinite loop is happening.
>>>>>>>
>>>>>>> -- thomas
>>>>>>>
>>>>>>> On 13 July 2015 at 01:22, Stephen Woodbridge
>>>>>>> <woodbri at swoodbridge.com> wrote:
>>>>>>>>
>>>>>>>> I added gdalinfo on an actual raster file below. It
>>>>>>>> turns out the -99999 is the NoData Value. I would be
>>>>>>>> happy to just get this value back (once), but I think
>>>>>>>> something is broken and putting mapserver into an
>>>>>>>> infinite loop.
>>>>>>>>
>>>>>>>> -Steve W
>>>>>>>>
>>>>>>>>
>>>>>>>> On 7/12/2015 7:14 PM, Stephen Woodbridge wrote:
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Hi all,
>>>>>>>>>
>>>>>>>>> I have run into a very strange problem doing a
>>>>>>>>> mapserver query. I'm upgrading a system that was
>>>>>>>>> running fine. The details are below. I also tried to
>>>>>>>>> put the template inside a CLASS ... END block that
>>>>>>>>> didn't help.
>>>>>>>>>
>>>>>>>>> Can anyone else reproduce something like this? Got
>>>>>>>>> any ideas on how to work around it?
>>>>>>>>>
>>>>>>>>> Thanks, -Steve W
>>>>>>>>>
>>>>>>>>> Old system: Ubuntu 12.04 LTS
>>>>>>>>>
>>>>>>>>> MapServer version 6.2.1 OUTPUT=GIF OUTPUT=PNG
>>>>>>>>> OUTPUT=JPEG SUPPORTS=PROJ SUPPORTS=GD SUPPORTS=AGG
>>>>>>>>> SUPPORTS=FREETYPE SUPPORTS=CAIRO SUPPORTS=SVG_SYMBOLS
>>>>>>>>> SUPPORTS=ICONV SUPPORTS=FRIBIDI SUPPORTS=WMS_SERVER
>>>>>>>>> SUPPORTS=WMS_CLIENT SUPPORTS=WFS_SERVER
>>>>>>>>> SUPPORTS=WFS_CLIENT SUPPORTS=WCS_SERVER
>>>>>>>>> SUPPORTS=SOS_SERVER SUPPORTS=FASTCGI SUPPORTS=THREADS
>>>>>>>>> SUPPORTS=GEOS INPUT=JPEG INPUT=POSTGIS INPUT=OGR
>>>>>>>>> INPUT=GDAL INPUT=SHAPEFILE
>>>>>>>>>
>>>>>>>>> New system: Ubuntu 14.04 LTS
>>>>>>>>>
>>>>>>>>> MapServer version 6.4.1 OUTPUT=GIF OUTPUT=PNG
>>>>>>>>> OUTPUT=JPEG OUTPUT=KML SUPPORTS=PROJ SUPPORTS=GD
>>>>>>>>> SUPPORTS=AGG SUPPORTS=FREETYPE SUPPORTS=CAIRO
>>>>>>>>> SUPPORTS=SVG_SYMBOLS SUPPORTS=RSVG SUPPORTS=ICONV
>>>>>>>>> SUPPORTS=FRIBIDI SUPPORTS=WMS_SERVER
>>>>>>>>> SUPPORTS=WMS_CLIENT SUPPORTS=WFS_SERVER
>>>>>>>>> SUPPORTS=WFS_CLIENT SUPPORTS=WCS_SERVER
>>>>>>>>> SUPPORTS=SOS_SERVER SUPPORTS=FASTCGI SUPPORTS=THREADS
>>>>>>>>> SUPPORTS=GEOS INPUT=JPEG INPUT=POSTGIS INPUT=OGR
>>>>>>>>> INPUT=GDAL INPUT=SHAPEFILE
>>>>>>>>>
>>>>>>>>> The query layer looks like this:
>>>>>>>>>
>>>>>>>>> LAYER NAME "model_query" STATUS on TYPE raster
>>>>>>>>>
>>>>>>>>> TILEINDEX "NOAA_Coastal_Relief_Model/index.shp"
>>>>>>>>> TILEITEM "LOCATION" TEMPLATE
>>>>>>>>> "/maps/wms/pixel.value.html" END
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> cat "/maps/wms/pixel.value.html" <!-- MapServer
>>>>>>>>> Template --> [value_0]
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> dbf_dump -info
>>>>>>>>> wms/data/Bathy/NOAA_Coastal_Relief_Model/index.dbf
>>>>>>>>> Filename:
>>>>>>>>> wms/data/Bathy/NOAA_Coastal_Relief_Model/index.dbf
>>>>>>>>> Version: 0x03 (ver. 3) Num of records: 61
>>>>>>>>> Header length: 65 Record length: 256 Last change:
>>>>>>>>> 1995/7/26 Num fields: 1 Field info: Num Name
>>>>>>>>> Type Len Decimal 1. LOCATION C
>>>>>>>>> 255 0
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> dbf_dump
>>>>>>>>> wms/data/Bathy/NOAA_Coastal_Relief_Model/index.dbf |
>>>>>>>>> head NOAA_Coastal_Relief_Model/BSM-1035.tif
>>>>>>>>> NOAA_Coastal_Relief_Model/BSM-1156.tif
>>>>>>>>> NOAA_Coastal_Relief_Model/BSM-1193.tif
>>>>>>>>> NOAA_Coastal_Relief_Model/BSM-1239.tif
>>>>>>>>> NOAA_Coastal_Relief_Model/BSM-1261.tif
>>>>>>>>> NOAA_Coastal_Relief_Model/BSM-1326.tif
>>>>>>>>> NOAA_Coastal_Relief_Model/BSM-1343.tif
>>>>>>>>> NOAA_Coastal_Relief_Model/BSM-1536.tif
>>>>>>>>> NOAA_Coastal_Relief_Model/BSM-1557.tif
>>>>>>>>> NOAA_Coastal_Relief_Model/BSM-1801.tif
>>>>>>>>>
>>>>>>>>> ogrinfo -so
>>>>>>>>> wms/data/Bathy/NOAA_Coastal_Relief_Model/index.shp
>>>>>>>>> index INFO: Open of
>>>>>>>>> `wms/data/Bathy/NOAA_Coastal_Relief_Model/index.shp'
>>>>>>>>> using driver `ESRI Shapefile' successful.
>>>>>>>>>
>>>>>>>>> Layer name: index Geometry: Polygon Feature Count:
>>>>>>>>> 61 Extent: (-130.000417, 16.999583) - (-65.999599,
>>>>>>>>> 49.000401) Layer SRS WKT: (unknown) location: String
>>>>>>>>> (255.0)
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> When I issue a query like:
>>>>>>>>>
>>>>>>>>> /usr/lib/cgi-bin/mapserv
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> QUERY_STRING='map=/maps/wms/bathymetry.map&mode=query&layers=model_query&mapxy=-100.98125+41.58125'
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
The old server responded with:
>>>>>>>>> Content-Type: text/html
>>>>>>>>>
>>>>>>>>> <HTML> <HEAD><TITLE>MapServer Message</TITLE></HEAD>
>>>>>>>>> <!-- MapServer version 6.2.1 OUTPUT=GIF OUTPUT=PNG
>>>>>>>>> OUTPUT=JPEG SUPPORTS=PROJ SUPPORTS=GD SUPPORTS=AGG
>>>>>>>>> SUPPORTS=FREETYPE SUPPORTS=CAIRO SUPPORTS=SVG_SYMBOLS
>>>>>>>>> SUPPORTS=ICONV SUPPORTS=FRIBIDI SUPPORTS=WMS_SERVER
>>>>>>>>> SUPPORTS=WMS_CLIENT SUPPORTS=WFS_SERVER
>>>>>>>>> SUPPORTS=WFS_CLIENT SUPPORTS=WCS_SERVER
>>>>>>>>> SUPPORTS=SOS_SERVER SUPPORTS=FASTCGI SUPPORTS=THREADS
>>>>>>>>> SUPPORTS=GEOS INPUT=JPEG INPUT=POSTGIS INPUT=OGR
>>>>>>>>> INPUT=GDAL INPUT=SHAPEFILE --> <BODY
>>>>>>>>> BGCOLOR="#FFFFFF"> msQueryByPoint(): Search returned
>>>>>>>>> no results. No matching record(s) found.
>>>>>>>>> </BODY></HTML>You have new mail in /var/mail/root
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> I get an infinite number of lines like the following
>>>>>>>>> on the new server:
>>>>>>>>>
>>>>>>>>> # /usr/lib/cgi-bin/mapserv
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> QUERY_STRING='map=/maps/wms/bathymetry.map&mode=query&layers=model_query&mapxy=-100.98125+41.58125'
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
| head
>>>>>>>>> Content-Type: text/html
>>>>>>>>>
>>>>>>>>> -99999 -99999 -99999 -99999 -99999 -99999 -99999
>>>>>>>>> -99999 ^C
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> # gdalinfo
>>>>>>>> wms/data/Bathy/NOAA_Coastal_Relief_Model/BSM-1156.tif
>>>>>>>> Driver: GTiff/GeoTIFF Files:
>>>>>>>> wms/data/Bathy/NOAA_Coastal_Relief_Model/BSM-1156.tif
>>>>>>>> Size is 4801, 4801 Coordinate System is: GEOGCS["WGS
>>>>>>>> 84", DATUM["WGS_1984", SPHEROID["WGS
>>>>>>>> 84",6378137,298.257223563, AUTHORITY["EPSG","7030"]],
>>>>>>>> AUTHORITY["EPSG","6326"]], PRIMEM["Greenwich",0],
>>>>>>>> UNIT["degree",0.0174532925199433],
>>>>>>>> AUTHORITY["EPSG","4326"]] Origin =
>>>>>>>> (-102.000833330000006,41.000817329999997) Pixel Size =
>>>>>>>> (0.000833330000000,-0.000833330000000) Metadata:
>>>>>>>> AREA_OR_POINT=Point Image Structure Metadata:
>>>>>>>> INTERLEAVE=BAND Corner Coordinates: Upper Left
>>>>>>>> (-102.0008333, 41.0008173) (102d 0' 3.00"W, 41d 0'
>>>>>>>> 2.94"N) Lower Left (-102.0008333, 37.0000000) (102d
>>>>>>>> 0' 3.00"W, 37d 0' 0.00"N) Upper Right ( -98.0000160,
>>>>>>>> 41.0008173) ( 98d 0' 0.06"W, 41d 0' 2.94"N) Lower Right
>>>>>>>> ( -98.0000160, 37.0000000) ( 98d 0' 0.06"W, 37d 0'
>>>>>>>> 0.00"N) Center (-100.0004247, 39.0004087) (100d
>>>>>>>> 0' 1.53"W, 39d 0' 1.47"N) Band 1 Block=256x256
>>>>>>>> Type=Float32, ColorInterp=Gray NoData Value=-99999
>>>>>>>> Overviews: 2401x2401, 1201x1201, 601x601, 301x301,
>>>>>>>> 151x151, 76x76, 38x38
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>>
>>>>>>>>> You have to ^C to kill it, even when using head. This
>>>>>>>>> seems like a serious bug as it runs for about 10 mins
>>>>>>>>> taking 100% CPU. If you call it via
>>>>>>>>> file_get_contents() in php is hangs the request and
>>>>>>>>> freezea my OL app until it is killed or kills php
>>>>>>>>> reading all the data.
>>>>>>>>> _______________________________________________
>>>>>>>>> mapserver-users mailing list
>>>>>>>>> mapserver-users at lists.osgeo.org
>>>>>>>>> http://lists.osgeo.org/mailman/listinfo/mapserver-users
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>>
_______________________________________________
>>>>>>>> mapserver-users mailing list
>>>>>>>> mapserver-users at lists.osgeo.org
>>>>>>>> http://lists.osgeo.org/mailman/listinfo/mapserver-users
>>>>>>
>>>>>>
>>>>>>
>>>>>>>>
_______________________________________________
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>>>>>> http://lists.osgeo.org/mailman/listinfo/mapserver-users
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> mapserver-users mailing list mapserver-users at lists.osgeo.org
>>>>> http://lists.osgeo.org/mailman/listinfo/mapserver-users
>>>
>>
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