Attachment upload/preview issue: Scheduled job with ID 'conversionLoader' failed due to binary incompatibilities

Platform Notice: Data Center Only - This article only applies to Atlassian products on the Data Center platform.

Note that this KB was created for the Data Center version of the product. Data Center KBs for non-Data-Center-specific features may also work for Server versions of the product, however they have not been tested. Support for Server* products ended on February 15th 2024. If you are running a Server product, you can visit the Atlassian Server end of support announcement to review your migration options.

*Except Fisheye and Crucible

Summary

Problem

While uploading an attachment in Confluence and using a View-file macro, it gives below error message

Error rendering macro 'view-file'

Could not initialize class com.atlassian.plugins.conversion.convert.image.SlidesConverter

The following errors occur when trying to load the package upon the last startup of Confluence appears in the atlassian-confluence.log

1 2 3 4 5 6 7 8 2019-05-02 15:36:45,794 ERROR [Caesium-1-2] [atlassian.scheduler.core.JobLauncher] launchAndBuildResponse Scheduled job with ID 'conversionLoader' failed due to binary incompatibilities -- referer: http://localhost:8099/setup/setupdata-start.action | url: /setup/setupdata.action | traceId: 8576b486aef5fb20 | userName: anonymous | action: setupdata java.lang.ExceptionInInitializerError Caused by: class com.aspose.slides.exceptions.ArgumentException: Culture Name: en-HK is not a supported culture java.lang.Thread.run(Thread.java:748) at com.aspose.slides.internal.ep.if.if(Unknown Source) at com.aspose.slides.internal.ep.if.<init>(Unknown Source) at com.aspose.slides.internal.ep.if.do(Unknown Source)

We also see below errors in the atlassian-confluence.log

1 2 3 4 5 6 7 8 9 10 11 12 java.lang.ExceptionInInitializerError: Exception java.lang.NoClassDefFoundError: Could not initialize class com.atlassian.plugins.conversion.convert.image.AbstractConverter [in thread "http-nio-8090-exec-14"] at com.benryan.components.DefaultSlideCacheManager.queueNewPptConversion(DefaultSlideCacheManager.java:281) at com.benryan.components.DefaultSlideCacheManager.queueNewConversion(DefaultSlideCacheManager.java:252) at com.benryan.components.DefaultSlideCacheManager.getFuture(DefaultSlideCacheManager.java:142) at com.benryan.components.DefaultSlideCacheManager.getFuture(DefaultSlideCacheManager.java:129) . . Caused by: java.lang.NoClassDefFoundError: Could not initialize class com.atlassian.plugins.conversion.convert.image.SlidesConverter at com.benryan.components.DefaultSlideCacheManager.queueNewPptConversion(DefaultSlideCacheManager.java:281) at com.benryan.components.DefaultSlideCacheManager.queueNewConversion(DefaultSlideCacheManager.java:252) at com.benryan.components.DefaultSlideCacheManager.getFuture(DefaultSlideCacheManager.java:142) at com.benryan.components.DefaultSlideCacheManager.getFuture(DefaultSlideCacheManager.java:129)

Diagnosis

Check the configuration in Confluence UI by doing the following:

  1. Navigate to General Configuration > System Information

  2. Look for the following and check if it is set as {{user.language=zh}} and {{user.country=HK}}:

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Cause

The 'System Locale' were not configured properly. From the above error, it seems like the settings are configured as:

1 2 -Duser.language=en -Duser.country=HK

Solution

Resolution

The correct language localization should be zh-HK as per stated in this JDK 8 Supported Locales or JDK 17 Supported Locales

In order to change the locale settings the recommended way is to add the additional arguments user.language and user.country to the JVM parameters. The details steps for adding the parameters is explained in this article - Configuring System Properties

Example parameter for the above error:

1 -Duser.language=zh -Duser.country=HK

Updated on April 2, 2025

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