Subversion E160004 X's root node's predecessor is Y but should be Z
svn, svnadmin
Solution
I met the same E160004 error, and I found the following two links helpful:
http://mail-archives.apache.org/mod_mbox/subversion-users/201401.mbox/%3C52CF3574.1060508@reser.org%3E
https://subversion.apache.org/docs/release-notes/1.8.html#verify-issue4129
So as for your Question 1, which I think you meant that you want to know how to fix this issue, "perform a dump/load cycle", as suggested in the second link above.
Question 2, it seems impossible, as I read the help of svnadmin and tried to do that.
Problem
I've inherited a large Subversion Repository (74010 Revisions) and I am trying to perform a dump/load to upgrade the repository to the 1.8 version to take advantage of the space saving features. Before attempting this process I ran `svnadmin verify` over the repository in question to ensure that the repository was in good shape. Unfortunately I received the following error message: ``` svnadmin: E160004: r1516's root node's predecessor is r1514 but should be r1515 ``` I've done a lot of googling to try and find the meaning of this error, but have been unable to find information for this specific error outside of a bug that apparently only occurred for new repositories. Unfortunately it also appears that this error number is used for several classes of errors. I can verify that this particular revision is missing when I perform a 'Show Log' in TortoiseSVN, I attempted to do a dump to see if we might be able to get a dump, but unsurprisingly it failed. This does not appear (on the surface) to have affected daily usage of this repository, however the inability to dump the repository is not a good thing. My questions are: - Is there something I can do to try and recover what history I can from this repository and start fresh? - Is there a way to have `svnadmin verify` show all errors instead of just failing on the first error?