Exception while loading data into the cache

Question

I'm getting the following error while attempting to pre-populate the cache:
2010-11-01 16:27:21,766 ERROR [STDERR] (Logger@9229983 n/a) 2010-11-01 16:27:21.766/632.975 Oracle Coherence EE n/a <Error> (thread=DistributedCache, member=1): SynchronousListener cannot be added on the service thread:
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache$BinaryMap.addMapListener(PartitionedCache.CDB:14)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache$ViewMap.addMapListener(PartitionedCache.CDB:1)
     at com.tangosol.coherence.component.util.SafeNamedCache.addMapListener(SafeNamedCache.CDB:27)
     at com.tangosol.net.cache.CachingMap.registerListener(CachingMap.java:1463)
     at com.tangosol.net.cache.CachingMap.ensureInvalidationStrategy(CachingMap.java:1579)
     at com.tangosol.net.cache.CachingMap.registerListener(CachingMap.java:1484)
     at com.tangosol.net.cache.CachingMap.get(CachingMap.java:487)
     at com.jpm.ibt.primegps.cachestore.AbstractGpsCacheStore.isEnabled(AbstractGpsCacheStore.java:54)
     at com.jpm.ibt.primegps.cachestore.AbstractGpsCacheStore.store(AbstractGpsCacheStore.java:83)
     at com.tangosol.net.cache.ReadWriteBackingMap$CacheStoreWrapper.store(ReadWriteBackingMap.java:4783)
     at com.tangosol.net.cache.ReadWriteBackingMap$CacheStoreWrapper.storeInternal(ReadWriteBackingMap.java:4468)
     at com.tangosol.net.cache.ReadWriteBackingMap.putInternal(ReadWriteBackingMap.java:1147)
     at com.tangosol.net.cache.ReadWriteBackingMap.put(ReadWriteBackingMap.java:853)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache$Storage.put(PartitionedCache.CDB:98)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache.onPutAllRequest(PartitionedCache.CDB:41)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache$PutAllRequest.onReceived(PartitionedCache.CDB:90)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.Grid.onMessage(Grid.CDB:11)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.Grid.onNotify(Grid.CDB:33)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.PartitionedService.onNotify(PartitionedService.CDB:3)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache.onNotify(PartitionedCache.CDB:3)
     at com.tangosol.coherence.component.util.Daemon.run(Daemon.CDB:42)
     at java.lang.Thread.run(Thread.java:619)
2010-11-01 16:27:21,829 ERROR [STDERR] (pool-14-thread-3) Exception in thread "pool-14-thread-3"
2010-11-01 16:27:21,829 ERROR [STDERR] (Logger@9229983 n/a) 2010-11-01 16:27:21.766/632.975 Oracle Coherence EE n/a <Error> (thread=DistributedCache, member=1): Assertion failed: poll() is a blocking call and cannot be called on the Service thread
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.Grid.poll(Grid.CDB:5)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.Grid.poll(Grid.CDB:11)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache$BinaryMap.get(PartitionedCache.CDB:26)
     at com.tangosol.util.ConverterCollections$ConverterMap.get(ConverterCollections.java:1559)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache$ViewMap.get(PartitionedCache.CDB:1)
     at com.tangosol.coherence.component.util.SafeNamedCache.get(SafeNamedCache.CDB:1)
     at com.tangosol.net.cache.CachingMap.get(CachingMap.java:491)
     at com.jpm.ibt.primegps.cachestore.AbstractGpsCacheStore.isEnabled(AbstractGpsCacheStore.java:54)
     at com.jpm.ibt.primegps.cachestore.AbstractGpsCacheStore.store(AbstractGpsCacheStore.java:83)
     at com.tangosol.net.cache.ReadWriteBackingMap$CacheStoreWrapper.store(ReadWriteBackingMap.java:4783)
     at com.tangosol.net.cache.ReadWriteBackingMap$CacheStoreWrapper.storeInternal(ReadWriteBackingMap.java:4468)
     at com.tangosol.net.cache.ReadWriteBackingMap.putInternal(ReadWriteBackingMap.java:1147)
     at com.tangosol.net.cache.ReadWriteBackingMap.put(ReadWriteBackingMap.java:853)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache$Storage.put(PartitionedCache.CDB:98)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache.onPutAllRequest(PartitionedCache.CDB:41)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache$PutAllRequest.onReceived(PartitionedCache.CDB:90)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.Grid.onMessage(Grid.CDB:11)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.Grid.onNotify(Grid.CDB:33)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.PartitionedService.onNotify(PartitionedService.CDB:3)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache.onNotify(PartitionedCache.CDB:3)
     at com.tangosol.coherence.component.util.Daemon.run(Daemon.CDB:42)
     at java.lang.Thread.run(Thread.java:619)
2010-11-01 16:27:21,922 ERROR [STDERR] (pool-14-thread-3) (Wrapped: Failed request execution for DistributedCache service on Member(Id=1, Timestamp=2010-11-01 16:20:09.372, Address=169.65.134.90:7850, MachineId=28250, Location=site:EMEA.AD.JPMORGANCHASE.COM,machine:WLDNTEC6WM754J,process:5416) (Wrapped: Failed to store key="9046019") poll() is a blocking call and cannot be called on the Service thread) com.tangosol.util.AssertionException: poll() is a blocking call and cannot be called on the Service threadI'm a bit stumped as my code doesn't call poll() anywhere and this appears to be caused by the following in my CacheStore class:
public void store(Object key, Object value) {
        log.info("CacheStore currently " + isEnabled());
        if (isEnabled()) {
            throw new UnsupportedOperationException("Store method not currently supported");
public boolean isEnabled() {
        return ((Boolean) CacheFactory.getCache(CacheNameEnum.CONTROL_CACHE.name()).get(ENABLED)).booleanValue();
    }the only thing I can think of is maybe it has a problem calling a cache from within a CacheStore (if that makes sense). What I have is a CONTROL_CACHE which just stores a boolean value to indicate whether the store(), storeAll(), erase(), and eraseAll() methods should do anything. Is this correct?

Answer 1

Hi Jonathan,
I am trying to implement a write-behind cache but my configs may be wrong. The config for the cache with the cachestore looks like:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE cache-config SYSTEM "cache-config.dtd" >
<cache-config>
     <caching-scheme-mapping>
     <cache-mapping>
          <cache-name>PARTY_CACHE</cache-name>
          <scheme-name>party_cache</scheme-name>
     </cache-mapping>
     </caching-scheme-mapping>
     <caching-schemes>
          <near-scheme>
               <scheme-name>party_cache</scheme-name>
               <service-name>partyCacheService</service-name>
               <!-- a sensible default ? -->
               <thread-count>5</thread-count>
               <front-scheme>
                    <local-scheme>
                    </local-scheme>
               </front-scheme>
               <back-scheme>
                    <distributed-scheme>
                         <backing-map-scheme>
                              <read-write-backing-map-scheme>
                                   <internal-cache-scheme>
                                        <local-scheme>
                                        </local-scheme>
                                   </internal-cache-scheme>
                                   <cachestore-scheme>
                                        <class-scheme>
                                             <class-name>spring-bean:partyCacheStore</class-name>
                                        </class-scheme>
                                   </cachestore-scheme>
                              </read-write-backing-map-scheme>
                         </backing-map-scheme>
                    </distributed-scheme>
               </back-scheme>
               <autostart>true</autostart>
          </near-scheme>
     </caching-schemes>
</cache-config>and the control cache config looks like:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE cache-config SYSTEM "cache-config.dtd" >
<cache-config>
     <caching-scheme-mapping>
     <cache-mapping>
          <cache-name>CONTROL_CACHE</cache-name>
          <scheme-name>control_cache</scheme-name>
     </cache-mapping>
     </caching-scheme-mapping>
     <caching-schemes>
          <near-scheme>
               <scheme-name>control_cache</scheme-name>
               <service-name>controlCacheService</service-name>
               <!-- a sensible default ? -->
               <thread-count>5</thread-count>
               <front-scheme>
                    <local-scheme>
                         <high-units>100</high-units>
                    </local-scheme>
               </front-scheme>
               <back-scheme>
                    <distributed-scheme>
                         <backing-map-scheme>
                              <read-write-backing-map-scheme>
                              </read-write-backing-map-scheme>
                         </backing-map-scheme>
                    </distributed-scheme>
               </back-scheme>
               <autostart>true</autostart>
          </near-scheme>
     </caching-schemes>
</cache-config>They have different service names but I'm guessing this isn't what you mean and I thought I was using write-behind but again I'm guessing my config is not correct?