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Corrupt svn dump file

I am trying to migrate our account to GIT, and ran into a rather obnoxious issue... Following the migration guide, I've created a svn dump (svn.dump.gz) and downloaded it, however I am unable to unpack this file, as gunzip exits stating

gzip: svn.dump.gz: unexpected end of file

Downloading the file again results in the same message and re-generating the file is prohibited by a rate limit of one backup per 48 hours.

Any help would be greatly appreciated!

5 answers

1 accepted

1 vote
Answer accepted

Bastiaan Jansen (Atlassian support) informed me that "the cause for the errors of the archive files is a known bug [https://jira.atlassian.com/browse/AOD-5975] in the OnDemand environment. After 1gb the file download stops, this leaves a incomplete file on your machine." Downloading the file using the supplied download script solved the issue.

1 vote

Hi Thomas,

This looks like that there may be some corruption on the transfer process or maybe on the OnDemand side, please create a Support Ticket to assist you with the migration of the SVN repository.

They can provide you with checksum hashs for the files so we can find out what/where the corruption is.

Cheers,
Felipe Cuozzo
Atlassian OnDemand

1 vote
LucasA Rising Star Feb 14, 2013

Hi Thomas,

Unfortunately you'll ned to recreate the SVN dump. If it's too big you can try to create the dump file only for a revision interval. The command will be something like:

svnadmin dump /path/to/your/repository -r0:100 | gzip > dump-revision-0-to-100.gz

Restore it as usual:

zcat dump-revision-0-to-100.gz | svnadmin load /path/to/your/repository

Best regards,
Lucas Timm

I can confirm that the direct download approach via: FishEye > Backup manager incurs serious issues particularly where there may be intermittency or interruption to / from:

https://appical.atlassian.net/webdav/backupmanager/

Several attempts were made in-browser (and using different browsers) and in every case no more than 1.1Gb could be download.

A download manager (eg DownThemAll) resolved the issue - beyond 1.1Gb limit (also offers resume functionality for interrupted / partial downloads).

Hi there Felipe & Lucas,

I am continuing / re-attempting the migration process from where Thomas left off.

I am undergoing your outlined steps / procedures as per :
http://go-dvcs.atlassian.com/display/aod/Migrating+from+Subversion+to+Git+on+Bitbucket

& using the latest svn-migration-scripts.jar (2013-03-18).

Currently I am @ step: 2)-1b:

Download the Subversion dump file. This dump file includes all the projects in your Subversion repository.

Download speeds however are no greater than 160 Kb/sec - which is taking awfully long for our 2.0Gb SVN Dump. Are there any alternative methods of access that may accommodate for faster downloads?

PS - 3 differnt ISP's, Lines & Locations were used to test speeds (which were unaffected).

Many thanks -

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