UnsupportedOperationException when using off-heap cache

Question

Hi,
When using put and/or putAll i get an UnsupportedOperationException when using an off-heap scheme in front of a
cache store class implementation we have. It works fine for all but off-heap schemes I think.
Any one else ran into this ?
Here is my config:
<caching-schemes>
<external-scheme>
<scheme-name>off-heap-scheme</scheme-name>
<nio-memory-manager>
<initial-size>100M</initial-size>
<maximum-size>10G</maximum-size>
</nio-memory-manager>
</external-scheme>
<distributed-scheme>
<scheme-name>off-heap-cache</scheme-name>
<service-name>OffHeapDistributedCache</service-name>
<thread-count>20</thread-count>
<local-storage>true</local-storage>
<partition-count>1009</partition-count>
<backup-count>1</backup-count>
<backup-count-after-writebehind>0</backup-count-after-writebehind>
<backup-storage>
<type>scheme</type>
<scheme-name>off-heap-scheme</scheme-name>
</backup-storage>
<backing-map-scheme>
<partitioned>false</partitioned>
<read-write-backing-map-scheme>
<internal-cache-scheme>
<external-scheme>
<scheme-ref>off-heap-scheme</scheme-ref>
</external-scheme>
</internal-cache-scheme>
<write-max-batch-size>128</write-max-batch-size>
<cachestore-scheme>
<class-scheme>
<class-name>my.PersistentCacheStoreFacade</class-name>
<init-params>
<init-param>
<param-type>java.lang.String</param-type>
<param-value>{cache-name}</param-value>
</init-param>
</init-params>
</class-scheme>
</cachestore-scheme>
<write-delay>5000ms</write-delay>
<write-batch-factor>0.1</write-batch-factor>
</read-write-backing-map-scheme>
</backing-map-scheme>
<autostart>true</autostart>
</distributed-scheme>
</caching-schemes>
/Niklas

Answer 1

Hi,
Just wanted to report back on some other findings.
I'm not sure why, but I actually ran into what you just talked about. Again.
I found this forum post about the exact same issue:
Unexpected effects of <partitioned> option for external backing map
(Note that the order of some elements in this shouldn't be allowed according to a strict xsd check)
I also added configuration for <write-max-batch-size>, <write-delay> and <write-batch-factor>.
That improved writing a lot.
My final config now looks something like this:
<read-write-backing-map-scheme>
<internal-cache-scheme>
<external-scheme>
<nio-memory-manager/>
*<high-units>1000000</high-units>*
*<unit-calculator>BINARY</unit-calculator>*
*<unit-factor>1048576</unit-factor>*
</external-scheme>
</internal-cache-scheme>
<write-max-batch-size>128</write-max-batch-size>
<cachestore-scheme>
<class-scheme>
<class-name>my.stuff.PersistentCacheStoreFacade</class-name>
<init-params>
<init-param>
<param-type>java.lang.String</param-type>
<param-value>{cache-name}</param-value>
</init-param>
</init-params>
</class-scheme>
</cachestore-scheme>
<write-delay>5000ms</write-delay>
<write-batch-factor>0.1</write-batch-factor>
</read-write-backing-map-scheme>