Re: [geogig-dev] Loading of GeoGig repositories fails after restart of G

[Erik Merkle <emerkle@xxxxxxxxxxxxxxxx>]

Hi Erik,

C

​an you clarify a few things for me?

It sounds like your GeoGig repository is created via GeoServer​, correct?

Then you are accessing the repository via QGIS. I'm assuming you are using the GeoGig plugin in QGIS to connect. If so, are you exposing the repository via command line "geogig serve", or are you accessing the repository as exposed via GeoServer (using a URL similar to http://localhost/geoserver/geogig/repos/myRepo)?

The error you are seeing may be related to one of a couple of issues that have been raised:

https://github.com/locationtech/geogig/issues/302
https://github.com/locationtech/geogig/issues/309

The problem with issue #309 is that there are 2 processes trying to access a single RocksDB database at the same time. Currently, the RocksDB integration in GeoGig is such that GeoGig will maintain an exclusive lock on the RocksDB database as long as the repository remains open in a given process. This means that GeoServer can serve out the repository, or "geogig serve" from the command line can serve out the repository, but not both at the same time. I suspect this may be the issue, if you have a QGIS session open and connected to the repository (via geogig serve), and then you try to restart GeoServer, which will try to open the repository as well.

If this is not the case, that is you only have a single process accessing the repository, then it may be related to issue #302, or it may be a new issue we have not come across.

If you would, could you please reply back and let us know if your issue is being caused by more than one process trying to access the database. If that is not the issue, we can collect more details and open a new ticket in GitHub.

Many thanks,

Erik Merkle
Software Engineer | Boundless

On Tue, Jun 20, 2017 at 12:25 AM, Erik Martinsen <ema@xxxxxxxxxx> wrote:

Hi,

 

We are testing GeoGig on a Windows Server 2012R2 with GeoServer 2.10.0. The server is installed with Java version 1.8.0_121. After creating file based GeoGig repositories we access them from QGIS Desktop 2.18.2.

 

From QGIS we can successfully add new layers to the repositories and make layer versioning and merging in master and branches.

 

However after a restart of the GeoServer the repositories fails with an error message of the following type for one and each of them when we try to access them from QGIS:

 

2017-06-19 13:39:31,954 WARN [geoserver.config] - Error loading GeoGig repository instance for id 5f646e20-aaee-4cd5-8f35-92045ed9c831

java.lang.RuntimeException: org.rocksdb.RocksDBException: ×

 

Further details is available from the attached geoserver.log file.

 

After restart of the GeoServer we can create a new repository that will be operating as expected until next time the GeoServer is restarted.

 

Are there some kind of close down or start up procedure for the GeoServer we are not aware of?

 

 

Best regards

Erik Martinsen
GIS developer

ARTOGIS a/s	Direct	+45 76 30 82 33
Eltangvej 61	Mobile	+45 20 31 46 16
DK-6000 Kolding	Phone	+45 75 53 73 93

ema@xxxxxxxxxx

 

 

 

 

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