{"id":279,"date":"2014-05-19T23:20:30","date_gmt":"2014-05-20T03:20:30","guid":{"rendered":"http:\/\/www.fkylewright.com\/?p=279"},"modified":"2018-04-23T08:51:19","modified_gmt":"2018-04-23T15:51:19","slug":"unable-display-web-part","status":"publish","type":"post","link":"https:\/\/www.fkylewright.com\/wordpress\/2014\/05\/unable-display-web-part\/","title":{"rendered":"Unable to Display this Web Part"},"content":{"rendered":"<p>In this latest installment of my ongoing series about intermittent SharePoint issues, I have been working with Microsoft Premier support on this web part error for well over a month now (xslttransformtimeout).<!--more--><\/p>\n<h2>The Issue<\/h2>\n<p>At random intervals, SharePoint list view web parts (XSLTListView) will display the following error message as soon as the containing page loads:<\/p>\n<figure id=\"attachment_280\" aria-describedby=\"caption-attachment-280\" style=\"width: 825px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/i0.wp.com\/www.fkylewright.com\/wordpress\/wp-content\/uploads\/2014\/05\/UnableToDisplayWebPart.jpg\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"280\" data-permalink=\"https:\/\/www.fkylewright.com\/wordpress\/2014\/05\/unable-display-web-part\/unabletodisplaywebpart\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.fkylewright.com\/wordpress\/wp-content\/uploads\/2014\/05\/UnableToDisplayWebPart-e1402366882965.jpg?fit=825%2C65&amp;ssl=1\" data-orig-size=\"825,65\" data-comments-opened=\"1\" data-image-title=\"Web Part Error Message\" data-image-description=\"&lt;p&gt;&amp;#8220;Unable to display this Web Part. To troubleshoot the problem, open this Web page in a Microsoft SharePoint Foundation-compatible HTML editor such as Microsoft SharePoint Designer. If the problem persists, contact your Web server administrator.&amp;#8221;&lt;\/p&gt;\n\" data-image-caption=\"&lt;p&gt;&amp;#8220;Unable to display this Web Part. To troubleshoot the problem, open this Web page in a Microsoft SharePoint Foundation-compatible HTML editor such as Microsoft SharePoint Designer. If the problem persists, contact your Web server administrator.&amp;#8221;&lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/www.fkylewright.com\/wordpress\/wp-content\/uploads\/2014\/05\/UnableToDisplayWebPart-e1402366882965.jpg?fit=825%2C65&amp;ssl=1\" class=\"wp-image-280 size-full\" src=\"https:\/\/i0.wp.com\/www.fkylewright.com\/wordpress\/wp-content\/uploads\/2014\/05\/UnableToDisplayWebPart-e1402366882965.jpg?resize=825%2C65\" alt=\"&quot;Unable to display this Web Part. To troubleshoot the problem, open this Web page in a Microsoft SharePoint Foundation-compatible HTML editor such as Microsoft SharePoint Designer. If the problem persists, contact your Web server administrator.&quot;\" width=\"825\" height=\"65\" srcset=\"https:\/\/i0.wp.com\/www.fkylewright.com\/wordpress\/wp-content\/uploads\/2014\/05\/UnableToDisplayWebPart-e1402366882965.jpg?w=825&amp;ssl=1 825w, https:\/\/i0.wp.com\/www.fkylewright.com\/wordpress\/wp-content\/uploads\/2014\/05\/UnableToDisplayWebPart-e1402366882965.jpg?resize=300%2C24&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.fkylewright.com\/wordpress\/wp-content\/uploads\/2014\/05\/UnableToDisplayWebPart-e1402366882965.jpg?resize=768%2C61&amp;ssl=1 768w\" sizes=\"auto, (max-width: 825px) 100vw, 825px\" \/><\/a><figcaption id=\"caption-attachment-280\" class=\"wp-caption-text\">Unable to display this Web Part. To troubleshoot the problem, open this Web page in a Microsoft SharePoint Foundation-compatible HTML editor such as Microsoft SharePoint Designer. If the problem persists, contact your Web server administrator.<\/figcaption><\/figure>\n<p>The end user can reproduce the message by loading the same page in alternate browsers (Firefox, Chrome, Safari, and IE 9 64-bit). Refreshing the page has no impact, nor does closing and restarting the web browser.<\/p>\n<h2>Troubleshooting<\/h2>\n<p>On the server side of things, ULS entries reveal a key error message:<\/p>\n<blockquote><p><em>Error while executing web part: System.InvalidProgramException: Common Language Runtime detected an invalid program.<\/em><\/p><\/blockquote>\n<h3>XSLT Transform Timeout<\/h3>\n<p>When Microsoft duplicated our environment in a test lab, they encountered an additional ULS entry related to XSLT transform timeout:<\/p>\n<blockquote><p><em>Error while executing web part: System.StackOverflowException: Operation caused a stack overflow.<\/em><\/p><\/blockquote>\n<p>..but our enterprise XsltTransformTimeOut value was set to 5 (instead of the default 1) a long time ago. We even raised it from 5 to 10 when this web part issue first showed up several months ago. Unfortunately, that seemed to have little or no impact on its sporadic appearances.<\/p>\n<h3>XSL Stylesheets<\/h3>\n<p>Today we investigated the consistency of the XSL stylesheet files across all the enterprise farm web frontends (WFE) and application servers (I&#8217;ll just say that we have a number of these). The specific files in question reside at C:\\Program Files\\Common Files\\Microsoft Shared\\Web Server Extensions\\14\\TEMPLATE\\LAYOUTS\\XSL\\. By design, the stylesheet files in this folder should remain consistent across all servers (same timestamp, size, and file contents).<\/p>\n<p>We found 3 stylesheets on a handful of servers that had timestamps different than the out-of-the-box versions (based on the latest patch level applied to our farm). Oddly, though, the internal contents of the stylesheets matched &#8212; there was no difference in the sheets, just the varying timestamp.<\/p>\n<p>SharePoint uses the timestamp of the files to validate XSLT rendering on-the-fly, by comparing the timestamp of the compiled XSLT in cache to that of the file on the current WFE. If there is a mismatch, SharePoint will recompile the XSLT and degrade performance. In theory, this mismatch should never occur and may cause odd\/unknown behavior when rendering\u00a0 XSLT.<\/p>\n<h2>Corrective Action(s)<\/h2>\n<p>So, solution to this <em><strong>possible<\/strong><\/em>cause of our parent issue? Copy the affected stylesheets from a known &#8220;valid&#8221; server and overwrite the mismatched files so that all the stylesheets across all the farm&#8217;s WFEs have matching timestamps, file sizes, and contents. Lastly, perform an IISRESET and wait to see if the issue recurs.<\/p>\n<p>And thus that is where I conclude my coverage of this issue for now. Perhaps I&#8217;ve banked adequate karma points to put this problem to bed.. but I am optimistically pessimistic by nature (so stay tuned for round 2!).<\/p>\n<p><em><strong>Update:<\/strong><\/em><a title=\"Unable to Display this Web Part \u2013 Round 2\" href=\"http:\/\/www.fkylewright.com\/?p=289\">Round 2 posted here!<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In this latest installment of my ongoing series about intermittent SharePoint issues, I have been working with Microsoft Premier support on this web part error for well over a month now (xslttransformtimeout).<\/p>\n","protected":false},"author":1,"featured_media":280,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_kadence_starter_templates_imported_post":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[21,11],"tags":[15,23,124,22,24,51,50],"class_list":["post-279","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sharepoint","category-technical","tag-enterprise","tag-microsoft","tag-sharepoint","tag-sharepoint-2010","tag-troubleshooting","tag-web-parts","tag-xslt"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - 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To troubleshoot the problem, open this Web page in a Microsoft SharePoint Foundation-compatible HTML editor such as Microsoft SharePoint Designer. 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I frequently use the SharePoint 2010 REST interface to access list items\u2026","rel":"","context":"In &quot;SharePoint&quot;","block_context":{"text":"SharePoint","link":"https:\/\/www.fkylewright.com\/wordpress\/category\/sharepoint\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.fkylewright.com\/wordpress\/wp-content\/uploads\/2015\/08\/ODataLogo-96.png?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":251,"url":"https:\/\/www.fkylewright.com\/wordpress\/2014\/04\/indexing-single-value-lookup-columns-strange-behavior\/","url_meta":{"origin":279,"position":3},"title":"SharePoint Single-Value Lookup Column Index (Strange Behavior)","author":"Kyle","date":"April 14, 2014","format":false,"excerpt":"Today's post continues my previous discussion of column index issues, but this time we focus solely on the indexing of a single-value lookup column and some of the strange behavior that indexing can produce when the row contains a blank value. 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However, if users tried to update existing items (evenly\u2026","rel":"","context":"In &quot;SharePoint&quot;","block_context":{"text":"SharePoint","link":"https:\/\/www.fkylewright.com\/wordpress\/category\/sharepoint\/"},"img":{"alt_text":"\"An unexpected error has occurred. Changes to your data cannot be saved. 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