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[FEATURE] ilServer: Add diagnostics for potential image issues#11364

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mjansenDatabay:feature/10/ilserver-fop-img-diagnostics
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[FEATURE] ilServer: Add diagnostics for potential image issues#11364
mjansenDatabay wants to merge 1 commit intoILIAS-eLearning:release_10from
mjansenDatabay:feature/10/ilserver-fop-img-diagnostics

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@mjansenDatabay mjansenDatabay commented Mar 27, 2026

This PR adds some additional diagnostics for issues when the (background) image (of a certificate) cannot be loaded. The current FOP generation is not very verbose, which makes it hard to debug such problems.

The suggested changes helped an ILIAS administrator identifying the following problem:

javax.net.ssl.SSLHandshakeException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target.

The issue was caused by the certificate issuer introducing a new root CA that was not present in the Java keystore. After importing the certificate and restarting the ilServer, background images are now rendered correctly.

If approved, please also pick the commit to all maintained branches.

@mjansenDatabay mjansenDatabay added improvement java Pull requests that update java code labels Mar 27, 2026
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