{"id":48082,"date":"2026-10-23T16:16:11","date_gmt":"2026-10-23T14:16:11","guid":{"rendered":"https:\/\/www.dbi-services.com\/blog\/?p=48082"},"modified":"2026-10-23T16:16:13","modified_gmt":"2026-10-23T14:16:13","slug":"oracle-ohs-14-1-2-upgrade-cache-broke-authentication","status":"publish","type":"post","link":"https:\/\/www.dbi-services.com\/blog\/oracle-ohs-14-1-2-upgrade-cache-broke-authentication\/","title":{"rendered":"Oracle OHS 14.1.2 Upgrade: Cache Broke Authentication"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">During a recent Oracle Fusion Middleware upgrade from <strong>12.2.1.4 to 14.1.2<\/strong>, I encountered an interesting issue with <a href=\"https:\/\/docs.oracle.com\/en\/middleware\/fusion-middleware\/14.1.2\/wgins\/configuring-oracle-http-server-webgate-oracle-access-manager.html\" target=\"_blank\" rel=\"noreferrer noopener\">Oracle HTTP Server (OHS) and WebGate<\/a>. The upgraded components were running, but WebGate initialization failed and the application was inaccessible.<\/p>\n\n\n\n<!--more-->\n\n\n\n<p class=\"wp-block-paragraph\">The root cause was not an incorrect OAM registration or a missing configuration file. It was a stale <code>ObAccessClient.xml<\/code> in the OHS\/WebGate runtime cache.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"160\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2026\/10\/image-86-1024x160.png\" alt=\"\" class=\"wp-image-48087\" srcset=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2026\/10\/image-86-1024x160.png 1024w, https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2026\/10\/image-86-300x47.png 300w, https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2026\/10\/image-86-768x120.png 768w, https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2026\/10\/image-86.png 1321w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 id=\"h-webgate-initialization-failure-after-upgrade\" class=\"wp-block-heading\">WebGate Initialization Failure After Upgrade<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">After upgrading OHS and WebGate to 14.1.2, the application returned HTTP 500 errors. The WebGate logs reported:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Exception thrown during WebGate initialization\n\nThe Access Server has returned a fatal error with no detailed information.<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Additional errors included:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>OAP over REST libcurl operation failed<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">These messages initially suggested an OAM connectivity or agent configuration issue.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">However, the OAM endpoint was reachable:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>curl -sv \\\n  http:\/\/&lt;oam-host&gt;:14100\/iam\/access\/binding\/api\/v10\/oap \\\n  -o \/dev\/null<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Response:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>HTTP\/1.1 405 Method Not Allowed<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">This confirmed HTTP connectivity to the endpoint, although it did not validate the complete OAP authentication exchange.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The next step was to verify whether WebGate was using the expected configuration.<\/p>\n\n\n\n<h2 id=\"h-root-cause-analysis-active-configuration-vs-runtime-cache\" class=\"wp-block-heading\">Root Cause Analysis: Active Configuration vs. Runtime Cache<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">WebGate uses <code>ObAccessClient.xml<\/code> and wallet files for its OAM agent configuration. I identified three relevant locations:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># OAM-generated configuration\n$IDM_DOMAIN\/output\/&lt;agent_name&gt;\/\n\n# Active WebGate configuration\n$ADF_DOMAIN\/config\/fmwconfig\/components\/OHS\/instances\/ohs1\/webgate\/config\/\n\n# WebGate runtime cache\n$ADF_DOMAIN\/servers\/ohs1\/cache\/<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">First, I compared the SHA-256 checksums of the OAM-generated files against the active OHS configuration.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>File<\/th><th>OAM-generated<\/th><th>OHS active<\/th><th>Result<\/th><\/tr><tr><td><code>ObAccessClient.xml<\/code><\/td><td><code>b110e7f0...3f07<\/code><\/td><td><code>b110e7f0...3f07<\/code><\/td><td>MATCH<\/td><\/tr><tr><td><code>cwallet.sso<\/code><\/td><td><code>d3c1aacb...5ba4<\/code><\/td><td><code>d3c1aacb...5ba4<\/code><\/td><td>MATCH<\/td><\/tr><tr><td><code>wallet\/cwallet.sso<\/code><\/td><td><code>5650892e...35a5<\/code><\/td><td><code>5650892e...35a5<\/code><\/td><td>MATCH<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">All three files were identical between the OAM-generated configuration and the active OHS configuration.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This was important: <strong>the deployed WebGate configuration and wallets were consistent with OAM.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">I then compared the active <code>ObAccessClient.xml<\/code> with the cached version.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sha256sum \\\n  $ADF_DOMAIN\/servers\/ohs1\/cache\/ObAccessClient.xml \\\n  $ADF_DOMAIN\/config\/fmwconfig\/components\/OHS\/instances\/ohs1\/webgate\/config\/ObAccessClient.xml<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Actual output:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>a1a5932a32b1c178461ab4cb373a14ff88446a6ad0cd9d2cdade90e5aecd4800  cache\/ObAccessClient.xml\nb110e7f0c8b153c1d17b7b79d4fc8273623fdb42dabafe0054d7c13e025d3f07  webgate\/config\/ObAccessClient.xml<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">The checksums are different. The cache directory also contained:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>-rw-r----- 7618 Oct 20 16:26 ObAccessClient.xml\n-rw-r-----    0 May 25  2021 ObAccessClient.xml.lck\n-rw-r-----    0 May 25  2021 polltracking.lck<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">While different checksums do not automatically indicate corruption, the cached configuration was inconsistent with the verified active configuration. This became my primary suspect.<\/p>\n\n\n\n<h2 id=\"h-resolution-removing-the-stale-webgate-cache\" class=\"wp-block-heading\">Resolution: Removing the Stale WebGate Cache<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">I stopped OHS using the domain management script:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>$ADF_DOMAIN\/bin\/stopComponent.sh ohs1<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Output:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Successfully Connected to Node Manager.\nKilling server ohs1 ...\nSuccessfully killed server ohs1<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">I confirmed that no OHS HTTP processes remained:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ps -ef | grep '&#091;h]ttpd'<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">No processes were returned. Next, I preserved the existing cached configuration:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>cd $ADF_DOMAIN\/servers\/ohs1\/cache\/\ncp -p ObAccessClient.xml \\\n  ObAccessClient.xml.pre14c_20261023<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">I removed only the cached configuration and its associated lock file:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>rm -f ObAccessClient.xml ObAccessClient.xml.lck<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">The active WebGate configuration and wallets were left untouched. I then restarted OHS:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>$ADF_DOMAIN\/bin\/startComponent.sh ohs1<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Output:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Successfully Connected to Node Manager.\nStarting server ohs1 ...\nSuccessfully started server ohs1 ...<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">An interesting observation occurred immediately after the restart. The initial directory listing showed that <code>ObAccessClient.xml<\/code> had not yet been recreated:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ObAccessClient.xml.pre14c_20261023\npolltracking.lck<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">A subsequent check showed that WebGate had automatically regenerated its runtime cache:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>-rw-r----- 7618 Oct 23 10:39 ObAccessClient.xml\n-rw-r-----    0 Oct 23 10:39 ObAccessClient.xml.lck\n-rw-r----- 7618 Oct 20 16:26 ObAccessClient.xml.pre14c_20261023<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">The newly generated files had fresh timestamps, while the backup preserved the original cached configuration.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Following this operation, WebGate initialized successfully and the protected application became accessible again through the expected authentication flow.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">No modification to the active configuration, wallet replacement, agent re-registration or WebGate reinstallation was necessary.<\/p>\n\n\n\n<h2 id=\"h-conclusion\" class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This case demonstrates an important troubleshooting consideration after upgrading Oracle HTTP Server and WebGate.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Even when the active <code>ObAccessClient.xml<\/code> and wallet files match the configuration generated by OAM, an outdated WebGate runtime cache can still interfere with initialization.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For future Oracle FMW upgrades, comparing the active and cached WebGate configurations is a valuable diagnostic step when authentication fails despite apparently correct OAM integration.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.dbi-services.com\/blog\/tag\/oracle-fusion-middleware\/\" target=\"_blank\" rel=\"noreferrer noopener\">Related blogs.<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>During a recent Oracle Fusion Middleware upgrade from 12.2.1.4 to 14.1.2, I encountered an interesting issue with Oracle HTTP Server (OHS) and WebGate. The upgraded components were running, but WebGate initialization failed and the application was inaccessible.<\/p>\n","protected":false},"author":46,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":"","_members_access_role":[],"_members_access_error":""},"categories":[197,2748],"tags":[490],"type_dbi":[],"class_list":["post-48082","post","type-post","status-publish","format-standard","hentry","category-application-integration-middleware","category-weblogic","tag-oracle-fusion-middleware"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.7 (Yoast SEO v28.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Oracle OHS 14.1.2 Upgrade: Cache Broke Authentication - dbi Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.dbi-services.com\/blog\/oracle-ohs-14-1-2-upgrade-cache-broke-authentication\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Oracle OHS 14.1.2 Upgrade: Cache Broke Authentication\" \/>\n<meta property=\"og:description\" content=\"During a recent Oracle Fusion Middleware upgrade from 12.2.1.4 to 14.1.2, I encountered an interesting issue with Oracle HTTP Server (OHS) and WebGate. 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