SLTaskbar Utility (command line options) – Data descriptor signature not found

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Hi Dojo,

We have a question related to SLTaskbarUtility. Currently we are using the command line options of this tool to install multiple application packages unattended (one at a time). We are able to successfully install the packages, however we see the following error when installing SRM and PA application packages:

Failed to detect needsRestart for upgrade PA-1.2.2_CU2-20210623110000.dmapp: ICSharpCode.SharpZipLib.Zip.ZipException: Data descriptor signature not found
at ICSharpCode.SharpZipLib.Zip.ZipInputStream.ReadDataDescriptor()
at ICSharpCode.SharpZipLib.Zip.ZipInputStream.CompleteCloseEntry(Boolean testCrc)
at ICSharpCode.SharpZipLib.Zip.ZipInputStream.BodyRead(Byte[] buffer, Int32 offset, Int32 count)
at ICSharpCode.SharpZipLib.Zip.ZipInputStream.Read(Byte[] buffer, Int32 offset, Int32 count)
at ICSharpCode.SharpZipLib.Zip.ZipInputStream.CloseEntry()
at ICSharpCode.SharpZipLib.Zip.ZipInputStream.GetNextEntry()
at Skyline.DataMiner.Net.Upgrade.UpgradeHelper.DetectWhetherUpgradeNeedsRestart(String filePath)
at Skyline.DataMiner.Net.Upgrade.AgentToUpgradeInfo.UploadUpgradeFile_Local()

Please could you let us know what is the reason of this issue and how we can be solved it?

Thanks

Miguel Obregon [SLC] [DevOps Catalyst] Selected answer as best 13th July 2021

1 Answer

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SLNet is trying to determine if DataMiner needs to restart after installing the application package. It looks like it's failing to read a file from the package because the signature is invalid or not found. Could this be because the SRM and PA packages were manually created/edited with a different ZIP library (not SharpZipLib)? How are the SRM and PA packages built?

If the authors of the SRM/PA package know in advance if a DataMiner restart is needed after installation, you can try to update the SRM/PA application packages to include an empty file in the root directory of the application package named 'RestartNeeded.txt' or 'NoRestartNeeded.txt'. This will tell SLNet that a restart is (or isn't) required, which may fix your issue.

Miguel Obregon [SLC] [DevOps Catalyst] Selected answer as best 13th July 2021
Miguel Obregon [SLC] [DevOps Catalyst] commented

Thanks for the information Jens!
I will create an internal task to further check your remarks with the teams responsible of these apps.