Latest Contributions by MarkChilcott

Hi Peoples, Has anyone else seen issues with ArcGIS Server 10.2.2, specifically in relation to load balancers and cached image services that appear to be missing tiles when returned via REST? A quick summary of our architecture. We have two instances of ArcGIS Server 10.2.2 running.  We have a load balancer in the DMZ that is configured to communicate with ArcGIS server via our reverse proxies through AJP. We are using cached image services for our base maps, which include an aerial photo layer, topographic base map, and scanned images of our topographic map series. The Problem: If we connect directly to the REST end points of our ArcGIS Servers, and view in ArcGIS JavaScript, the services work fine.  No problem. If we connect via the Load Balancer to the REST end point, as we zoom in and pan around, tiles are missing.  If we turn Fiddler on, we obtain a Protocol Violation Report, with Content-Length mismatch errors. We did not see this in ArcGIS Server 10.1. Further investigation Looking further into this, we discovered the content-length header is extremely important. If it is present and non-zero, the container assumes that the request has a body (a POST request, for example), and immediately reads a separate packet off the input stream to get that body.  There appears to be a bug fix for a security flaw in the 7.0.47 release of Tomcat specifically to do with the Content-Length. It could be a coincidence, but ArcGIS Server 10.2.2 ships with Tomcat 7.0.47, while 10.1 ships with 7.0.27. This issue seems to be specific to the AJP protocol.  If we swap to using HTTP, the issue seems to be fixed.  We could do this, but that is going to cause us some grief with DMZ, fire walls, existing systems etc. We think this is due to the version of Tomcat that ships with ArcGIS Server 10.2.2. Anyone else seen this?  Anyone know which version of Tomcat 10.3 ships with? References: http://tomcat.apache.org/security-7.html#Fixed_in_Apache_Tomcat_7.0.47 https://confluence.atlassian.com/display/CONFKB/How+to+Determine+Your+Version+of+Tomcat+and+Java http://tomcat.apache.org/connectors-doc/ajp/ajpv13a.html http://www.wellho.net/mouth/1549_http-https-and-ajp-comparison-and-choice.html Cheers, Mark ... View more

Hi Peoples, Came across this bug in 10.2.2 the other day.  Posting this so if others come across it they will know the work around. Summary: Spatial reference incorrectly set for image services with WMS capabilities, when Image has Web Mercator Auxiliary Sphere as projection. Problem did not exist in 10.1. How to Reproduce: Take any image that has the projection : WGS_1984_Web_Mercator_Auxiliary_Sphere : WKID: 3857 Copy the image to a folder that has been registered as a Data Store with ArcGIS Server. Open ArcCatalog, navigate to the image, right click and share as Image Service.      Publish as Service      Service Editor > Capabilities > Enable WMS      Publish the service with default settings Open the ArcGIS REST endpoint for the image service Select the WMS link, and check the GetCapabilities for the WMS service. URL will be something like: http://<your server>:6080/arcgis/services/Raster/TestWMSAux/ImageServer/WMSServer?request=GetCapabilities&service=WMS Note the CRS statement: <CRS>CRS:84</CRS> <CRS>EPSG:4326</CRS> <CRS>EPSG:0</CRS> NOTE the CRS is set to EPSG:0  This is incorrect.  It should be set to EPSG:3857, which is the projection of the original data.  In ArcGIS 10.1 this is correct.  By default, WMS services only list two spatial reference systems; EPSG:4326 (or CSR:84 for WMS 1.3.0) and the spatial reference of the map service that WMS is enabled on. http://resources.arcgis.com/en/help/main/10.1/index.html#//015400000596000000 It would appear the CRS is not being picked up for the image, and thus being set to 0. This has the effect the image cannot be added as a WMS service in projection 3857. Work Around: Change the WMS service property: Additional spatial reference systems Use Manager or ArcCatalog to add the projection to the WMS service properties manually.  This will fix the problem. Additional reference: http://resources.arcgis.com/en/help/main/10.1/index.html#//00sq000000m1000000 Cheers, Mark ... View more

Hi Peoples, We have installed ArcGIS Server 10.2.2 on our test instance, and just found the minPixelSize and maxPixelSize have been reversed in the JSON REST. This is a cached image service. Our 10.1.1 image service is here, and is correct: http://services.thelist.tas.gov.au/arcgis/rest/services/Basemaps/Topographic/ImageServer?f=pjson      "minPixelSize": 0.5971642835598172,      "maxPixelSize": 9783.93962049996, On our current TEST server, ArcGIS 10.2.2, this is the same service: "minPixelSize": 9783.93962049996, "maxPixelSize": 0.5971642835598172, Note this is incorrect. Has anyone else seen this?  Is it a known issue? Our initial tests would indicate some third party apps rely on this, and it is going to be an issue. Cheers, mark ... View more

When you add an ArcGIS Map Service to ArcMap, that contains many layers, all the layers are added to the map document.  You cannot choose which layers you want added, and cannot choose just a single layer from the service you are interested in. I would like the ability to choose which layers in the ArcGIS Map Service I want to add to the map document. ... View more