Problems opening a database in read only mode

[Pablo Pareja]

Hi,

I'm not able to open an existing database in read only mode using Titan 0.5.2 with the following properties configuration file:

storage.directory=bio4j

storage.backend=berkeleyje

storage.transactions=false

storage.read-only=true

query.fast-property=false

graph.allow-stale-config=false

storage.berkeleydb.cache-percentage=20

Here's the exception stack trace that I get:

SEVERE: null

com.thinkaurelius.titan.core.TitanException: Could not execute operation due to backend exception

        at com.thinkaurelius.titan.diskstorage.util.BackendOperation.execute(BackendOperation.java:44)

        at com.thinkaurelius.titan.diskstorage.util.BackendOperation.execute(BackendOperation.java:144)

        at com.thinkaurelius.titan.diskstorage.configuration.backend.KCVSConfiguration.set(KCVSConfiguration.java:138)

        at com.thinkaurelius.titan.diskstorage.configuration.backend.KCVSConfiguration.set(KCVSConfiguration.java:115)

        at com.thinkaurelius.titan.diskstorage.configuration.ModifiableConfiguration.set(ModifiableConfiguration.java:27)

        at com.thinkaurelius.titan.graphdb.database.StandardTitanGraph.<init>(StandardTitanGraph.java:130)

        at com.thinkaurelius.titan.core.TitanFactory.open(TitanFactory.java:91)

        at com.thinkaurelius.titan.core.TitanFactory.open(TitanFactory.java:60)

        at com.bio4j.examples.enzyme.GetProteinEnzymaticActivity.main(GetProteinEnzymaticActivity.java:56)

        at com.bio4j.examples.enzyme.GetProteinEnzymaticActivity.execute(GetProteinEnzymaticActivity.java:41)

        at com.era7.bioinfo.bioinfoutil.ExecuteFromFile.main(ExecuteFromFile.java:66)

        at com.bio4j.examples.ExecuteBio4jExample.main(ExecuteBio4jExample.java:17)

Caused by: com.thinkaurelius.titan.diskstorage.PermanentBackendException: Permanent exception while executing backend operation setConfiguration

        at com.thinkaurelius.titan.diskstorage.util.BackendOperation.executeDirect(BackendOperation.java:69)

        at com.thinkaurelius.titan.diskstorage.util.BackendOperation.execute(BackendOperation.java:42)

        ... 11 more

Caused by: java.lang.UnsupportedOperationException: Database is Read Only: put

        at com.sleepycat.je.Database.checkWritable(Database.java:1893)

        at com.sleepycat.je.Database.put(Database.java:1169)

        at com.thinkaurelius.titan.diskstorage.berkeleyje.BerkeleyJEKeyValueStore.insert(BerkeleyJEKeyValueStore.java:194)

        at com.thinkaurelius.titan.diskstorage.berkeleyje.BerkeleyJEKeyValueStore.insert(BerkeleyJEKeyValueStore.java:183)

        at com.thinkaurelius.titan.diskstorage.keycolumnvalue.keyvalue.OrderedKeyValueStoreAdapter.mutate(OrderedKeyValueStoreAdapter.java:86)

        at com.thinkaurelius.titan.diskstorage.configuration.backend.KCVSConfiguration$2.call(KCVSConfiguration.java:143)

        at com.thinkaurelius.titan.diskstorage.configuration.backend.KCVSConfiguration$2.call(KCVSConfiguration.java:138)

        at com.thinkaurelius.titan.diskstorage.util.BackendOperation.execute(BackendOperation.java:133)

        at com.thinkaurelius.titan.diskstorage.util.BackendOperation$1.call(BackendOperation.java:147)

        at com.thinkaurelius.titan.diskstorage.util.BackendOperation.executeDirect(BackendOperation.java:56)

        ... 12 more

Any ideas why?

Thanks in advance,

Pablo Pareja

--

Pablo Pareja Tobes 

My site     http://www.pablo-pareja.com

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Creator of Bio4j --> http://www.bio4j.com

http://www.ohnosequences.com

[Matthias Broecheler]

This is a bug. We kind of went aware from full database read-only mode to a read-only per transaction mode. You can specify your transaction to be read-only when opening a transaction.

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[Pablo Pareja]

Are there any plans to fix it for the next release?

Cheers

Pablo

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[Matthias Broecheler]

https://github.com/thinkaurelius/titan/issues/1025

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