Drag-and-Drop CSS File Warnings Appear Repeatedly in Logs Post Confluence 9.2.10 Upgrade

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    • 5
    • Severity 3 - Minor
    • 19

      Problem

      We are encountering recurring warnings in the application logs regarding drag-and-drop CSS files following the upgrade to Confluence version 9.2.10.

      Environment

      Confluence Data Center version 9.2.10

      Steps to Reproduce

      1. Install or upgrade Confluence to version 9.2.10
      2. Create a page and drag and drop an attachment
      3. You will notice the repeated warnings in the application logs about drag-and-drop CSS files.

      Expected Results

      Confluence should add the attachments without any warnings.

      Actual Results

      The application log repeatedly warns about web resources, particularly the CSS file from Confluence Drag and Drop Plugin, although the drag-and-drop function works as expected.

      2025-11-06 19:31:01,619 WARN [http-nio-29210-exec-9] [cache.filecache.impl.OneStreamCache] tryStreamCallback Problem caching to disk, skipping cache for this entry
 -- url: /c9210/s/d41d8cd98f00b204e9800998ecf8427e-CDN/wtzisk/9111/4u2g82/2e1212a6eda61da4b68f183448c69126/_/download/contextbatch/css/com.atlassian.confluence.plugins.drag-and-drop:editor-drop-handler,com.atlassian.confluence.plugins.confluence-emoticons-plugin:emoticon-autoformat-manager,com.atlassian.confluence.plugins.confluence-emoticons-plugin:emoticon-autocomplete-manager,com.atlassian.confluence.extra.team-calendars:editor,-_super,-macro-browser,-editor,-main,-com.atlassian.confluence.plugins.confluence-space-ia:spacesidebar,-atl.general,-page,-com.atlassian.confluence.plugins.collaborative-editing-feedback-plugin:1,-browser-metrics-plugin.contrib/batch.css | userName: admin | referer: http://localhost:29210/c9210/pages/resumedraft.action?draftId=163925&draftShareId=d858723d-064c-42d6-bb6b-22137e11efd9& | traceId: 3d588e8c64b7ec70
java.lang.RuntimeException: Cannot read resource css/drag-and-drop.css
	at com.atlassian.plugin.webresource.impl.snapshot.resource.strategy.contentprovider.StreamContentProviderStrategy$1.writeTo(StreamContentProviderStrategy.java:34)
	at com.atlassian.plugin.webresource.impl.support.factory.InitialSourceContent$1.writeTo(InitialSourceContent.java:37)
	
2025-11-06 19:31:01,629 WARN [http-nio-29210-exec-9] [cache.filecache.impl.OneStreamCache] tryStreamCallback Problem caching to disk, skipping cache for this entry
 -- url: /c9210/s/d41d8cd98f00b204e9800998ecf8427e-CDN/wtzisk/9111/4u2g82/2e1212a6eda61da4b68f183448c69126/_/download/contextbatch/css/com.atlassian.confluence.plugins.drag-and-drop:editor-drop-handler,com.atlassian.confluence.plugins.confluence-emoticons-plugin:emoticon-autoformat-manager,com.atlassian.confluence.plugins.confluence-emoticons-plugin:emoticon-autocomplete-manager,com.atlassian.confluence.extra.team-calendars:editor,-_super,-macro-browser,-editor,-main,-com.atlassian.confluence.plugins.confluence-space-ia:spacesidebar,-atl.general,-page,-com.atlassian.confluence.plugins.collaborative-editing-feedback-plugin:1,-browser-metrics-plugin.contrib/batch.css | userName: admin | referer: http://localhost:29210/c9210/pages/resumedraft.action?draftId=163925&draftShareId=d858723d-064c-42d6-bb6b-22137e11efd9& | traceId: 3d588e8c64b7ec70
java.lang.RuntimeException: Cannot read resource css/drop-zone.css
	at com.atlassian.plugin.webresource.impl.snapshot.resource.strategy.contentprovider.StreamContentProviderStrategy$1.writeTo(StreamContentProviderStrategy.java:34)
	at com.atlassian.plugin.webresource.impl.support.factory.InitialSourceContent$1.writeTo(InitialSourceContent.java:37)
	
2025-11-06 19:31:01,634 WARN [http-nio-29210-exec-9] [cache.filecache.impl.OneStreamCache] tryStreamCallback Problem caching to disk, skipping cache for this entry
 -- url: /c9210/s/d41d8cd98f00b204e9800998ecf8427e-CDN/wtzisk/9111/4u2g82/2e1212a6eda61da4b68f183448c69126/_/download/contextbatch/css/com.atlassian.confluence.plugins.drag-and-drop:editor-drop-handler,com.atlassian.confluence.plugins.confluence-emoticons-plugin:emoticon-autoformat-manager,com.atlassian.confluence.plugins.confluence-emoticons-plugin:emoticon-autocomplete-manager,com.atlassian.confluence.extra.team-calendars:editor,-_super,-macro-browser,-editor,-main,-com.atlassian.confluence.plugins.confluence-space-ia:spacesidebar,-atl.general,-page,-com.atlassian.confluence.plugins.collaborative-editing-feedback-plugin:1,-browser-metrics-plugin.contrib/batch.css | userName: admin | referer: http://localhost:29210/c9210/pages/resumedraft.action?draftId=163925&draftShareId=d858723d-064c-42d6-bb6b-22137e11efd9& | traceId: 3d588e8c64b7ec70
java.lang.RuntimeException: Cannot read resource css/drag-and-drop-overlay.css
	at com.atlassian.plugin.webresource.impl.snapshot.resource.strategy.contentprovider.StreamContentProviderStrategy$1.writeTo(StreamContentProviderStrategy.java:34)
	at com.atlassian.plugin.webresource.impl.support.factory.InitialSourceContent$1.writeTo(InitialSourceContent.java:37)

2025-11-06 19:31:01,638 WARN [http-nio-29210-exec-9] [cache.filecache.impl.OneStreamCache] tryStreamCallback Problem caching to disk, skipping cache for this entry
 -- url: /c9210/s/d41d8cd98f00b204e9800998ecf8427e-CDN/wtzisk/9111/4u2g82/2e1212a6eda61da4b68f183448c69126/_/download/contextbatch/css/com.atlassian.confluence.plugins.drag-and-drop:editor-drop-handler,com.atlassian.confluence.plugins.confluence-emoticons-plugin:emoticon-autoformat-manager,com.atlassian.confluence.plugins.confluence-emoticons-plugin:emoticon-autocomplete-manager,com.atlassian.confluence.extra.team-calendars:editor,-_super,-macro-browser,-editor,-main,-com.atlassian.confluence.plugins.confluence-space-ia:spacesidebar,-atl.general,-page,-com.atlassian.confluence.plugins.collaborative-editing-feedback-plugin:1,-browser-metrics-plugin.contrib/batch.css | userName: admin | referer: http://localhost:29210/c9210/pages/resumedraft.action?draftId=163925&draftShareId=d858723d-064c-42d6-bb6b-22137e11efd9& | traceId: 3d588e8c64b7ec70
java.lang.RuntimeException: Cannot read resource css/image-dialog-client-browser-button.css
	at com.atlassian.plugin.webresource.impl.snapshot.resource.strategy.contentprovider.StreamContentProviderStrategy$1.writeTo(StreamContentProviderStrategy.java:34)
	at com.atlassian.plugin.webresource.impl.support.factory.InitialSourceContent$1.writeTo(InitialSourceContent.java:37)

       

      Workaround

      Currently there is no known workaround for this behavior. A workaround will be added here when available

        1. com.atlassian.confluence.plugins.confluence-drag-and-drop-19.2.28.jar
          178 kB

            Assignee:
            Quan Pham
            Reporter:
            Vishnu Prasad P S
            Votes:
            6 Vote for this issue
            Watchers:
            13 Start watching this issue

              Created:
              Updated:
              Resolved: