There isn't too much else useful in the log, i've tried deleting all the DB files on both sides, starting a clean master and verifying it works as expected and the DB's are recording from the very first transaction. Now when I go to run the slave server and get it to replicate I still get logs full of:
java.lang.NullPointerException
at com.objectdb.o.SFL.ae(SFL.java:851)
at com.objectdb.o.MST.ae(MST.java:1378)
at com.objectdb.o.MST.Vb(MST.java:1289)
at com.objectdb.o.WRA.Vb(WRA.java:369)
at com.objectdb.o.WSM.Vb(WSM.java:174)
at com.objectdb.o.WRA.Vb(WRA.java:369)
at com.objectdb.o.WSN.Vb(WSN.java:658)
at com.objectdb.o.STC.v(STC.java:511)
at com.objectdb.o.STC.i(STC.java:248)
at com.objectdb.o.STC.h(STC.java:142)
at com.objectdb.o.RPR.run(RPR.java:202)
at java.lang.Thread.run(Thread.java:722)
com.objectdb.o.UserException: Failed to synchronize replicated database
at com.objectdb.o.MSG.d(MSG.java:61)
at com.objectdb.o.RPT.d(RPT.java:97)
at com.objectdb.o.RPT.<init>(RPT.java:65)
at com.objectdb.o.SHN.aw(SHN.java:704)
at com.objectdb.o.SHN.K(SHN.java:203)
at com.objectdb.o.HND.run(HND.java:133)
at java.lang.Thread.run(Thread.java:722)
However I do see all the DB's under "/usr/test/backend/db/$replication/" on the slave; "/usr/test/backend/db/" is the data path and where all the DB's are on the master. I cannot get an EntityManager connection to the slave DB though.
I've tried stopping both servers and copying the db files from the master across to the slave first just in case as per: http://www.objectdb.com/database/forum/346 even though this shouldn't be relevant since I have recording on from the start.
It's worth noting that some of the databases may be totally empty(no objects persisted) when trying to replicate.
I'm going to show you my master and slave config files in case there is something obvious I am doing wrong:
Master
<objectdb>
<general>
<temp path="$temp/ObjectDB" threshold="64mb" />
<network inactivity-timeout="0" />
<url-history size="50" user="true" password="true" />
<log path="/var/log/test/" max="10mb" stdout="false" stderr="false" />
<log-archive path="/var/log/test/archive/" retain="90" />
<logger name="*" level="info" />
</general>
<database>
<size initial="10mb" resize="10mb" page="2kb" />
<recovery enabled="true" sync="false" path="." max="512mb" />
<recording enabled="true" sync="false" path="." mode="write" />
<locking version-check="true" />
<processing cache="64mb" max-threads="10" synchronized="false" />
<query-cache results="32mb" programs="500" />
<extensions drop="test,testing" />
</database>
<entities>
<enhancement agent="true" reflection="error" />
<cache ref="weak" level2="0mb" />
<persist serialization="false" />
<cascade-persist always="auto" on-persist="false" on-commit="true" />
<dirty-tracking arrays="false" />
</entities>
<schema>
</schema>
<server>
<connection port="2122" max="100" />
<data path="/usr/test/backend/db/" />
</server>
<users>
<user username="backend" password="password" admin="true">
<dir path="/" permissions="access,modify,create,delete" />
</user>
<user username="backend-ro" password="password">
<dir path="/" permissions="access" />
</user>
</users>
<ssl enabled="false">
<server-keystore path="$objectdb/ssl/server-kstore" password="pwd" />
<client-truststore path="$objectdb/ssl/client-tstore" password="pwd" />
</ssl>
</objectdb> Slave
<objectdb>
<general>
<temp path="$temp/ObjectDB" threshold="64mb" />
<network inactivity-timeout="0" />
<url-history size="50" user="true" password="true" />
<log path="/var/log/test/" max="10mb" stdout="false" stderr="false" />
<log-archive path="/var/log/test/archive/" retain="90" />
<logger name="*" level="info" />
</general>
<database>
<size initial="10mb" resize="10mb" page="2kb" />
<recovery enabled="true" sync="false" path="." max="512mb" />
<recording enabled="true" sync="false" path="." mode="write" />
<locking version-check="true" />
<processing cache="64mb" max-threads="10" synchronized="false" />
<query-cache results="32mb" programs="500" />
<extensions drop="test,testing" />
</database>
<entities>
<enhancement agent="true" reflection="error" />
<cache ref="weak" level2="0mb" />
<persist serialization="false" />
<cascade-persist always="auto" on-persist="false" on-commit="true" />
<dirty-tracking arrays="false" />
</entities>
<schema>
</schema>
<server>
<connection port="2122" max="100" />
<data path="/usr/test/backend/db/" />
<replication url="objectdb://master:2122/w.odb;user=backend-ro;password=password" />
<replication url="objectdb://master:2122/x.odb;user=backend-ro;password=password" />
<replication url="objectdb://master:2122/y.odb;user=backend-ro;password=password" />
<replication url="objectdb://master:2122/z.odb;user=backend-ro;password=password" />
</server>
<users>
<user username="backend-ro" password="password">
<dir path="/" permissions="access" />
</user>
</users>
<ssl enabled="false">
<server-keystore path="$objectdb/ssl/server-kstore" password="pwd" />
<client-truststore path="$objectdb/ssl/client-tstore" password="pwd" />
</ssl>
</objectdb>
I'm using the following connection String for my slave EntityManagerFactory:
"objectdb://localhost:2122//master:2122/x.odb;user=backend-ro;password=password"
The master is working 100% fine with:
"objectdb://master:2122/x.odb;user=backend;password=password" and the above config.
I was expecting I should be able to point that slave config at a master without any existing DB files on the slave and have it replicate without too much pain, assuming recording is enabled from the start.
