NullPointerException thrown when the InferenceAgent tries to load an entity from backingstore (JDBC driver)
Article ID: KB0071633
Updated On:
| Products | Versions |
|---|---|
| TIBCO BusinessEvents Enterprise Edition | 6.0.0, 6.1.0, 6.1.1, 6.1.2, 6.2.0, 6.2.1, 6.2.2 |
Description
Under heavy load, the following exception can be thrown when Oracle is configured as the backingstore and the InferenceAgent loads an old version of the JDBC Oracle driver.
<timeStamp> <agentName> WARN [<workerThread>] - [runtime.service] [<agent>] Cache: Exception in get(<{ID|extID}>), retry num=1: java.lang.RuntimeException: Exception reading entry from backingstore.
javax.cache.integration.CacheLoaderException: java.lang.RuntimeException: Exception reading entry from backingstore.
at org.apache.ignite.internal.processors.cache.store.GridCacheStoreManagerAdapter.loadFromStore(GridCacheStoreManagerAdapter.java:338)
at org.apache.ignite.internal.processors.cache.store.GridCacheStoreManagerAdapter.load(GridCacheStoreManagerAdapter.java:293)
at org.apache.ignite.internal.processors.cache.store.GridCacheStoreManagerAdapter.loadAllFromStore(GridCacheStoreManagerAdapter.java:434)
at org.apache.ignite.internal.processors.cache.store.GridCacheStoreManagerAdapter.loadAll(GridCacheStoreManagerAdapter.java:400)
at org.apache.ignite.internal.processors.cache.GridCacheAdapter$18.call(GridCacheAdapter.java:2241)
at org.apache.ignite.internal.processors.cache.GridCacheAdapter$18.call(GridCacheAdapter.java:2239)
at org.apache.ignite.internal.util.IgniteUtils.wrapThreadLoader(IgniteUtils.java:7085)
at org.apache.ignite.internal.processors.closure.GridClosureProcessor$2.body(GridClosureProcessor.java:971)
at org.apache.ignite.internal.util.worker.GridWorker.run(GridWorker.java:120)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.lang.RuntimeException: Exception reading entry from backingstore.
at com.tibco.cep.ignite.cache.IgniteCacheLoader.load(IgniteCacheLoader.java:43)
at org.apache.ignite.internal.processors.cache.GridCacheLoaderWriterStore.load(GridCacheLoaderWriterStore.java:105)
at org.apache.ignite.internal.processors.cache.CacheStoreBalancingWrapper.load(CacheStoreBalancingWrapper.java:98)
at org.apache.ignite.internal.processors.cache.store.GridCacheStoreManagerAdapter.loadFromStore(GridCacheStoreManagerAdapter.java:327)
... 11 more
Caused by: java.lang.NullPointerException
at com.tibco.cep.ignite.cache.IgniteCacheLoader.load(IgniteCacheLoader.java:41)
... 14 more
Environment
All Operating Systems (Cache- and backingstore enabled)
Resolution
The error can be thrown if an old JDBC driver is loaded by the InferenceAgent (ojdbc6.jar instead of ojdbc8.jar).
To avoid the error, stop all agents, remove the old jdbc driver from classpath and copy the latest version to the classpath. To ensure that the new JDBC driver is loaded, update the property "tibco.env.CUSTOM_EXT_PREPEND_CP" and add the folder where you copied the new JDBC libraries.
The Oracle JDBC drivers are available here: Oracle JDBC driver download
To avoid the error, stop all agents, remove the old jdbc driver from classpath and copy the latest version to the classpath. To ensure that the new JDBC driver is loaded, update the property "tibco.env.CUSTOM_EXT_PREPEND_CP" and add the folder where you copied the new JDBC libraries.
The Oracle JDBC drivers are available here: Oracle JDBC driver download
Issue/Introduction
Exception in get(<{ID|extID}>), retry num=1: java.lang.RuntimeException: Exception reading entry from backingstore.
javax.cache.integration.CacheLoaderException: java.lang.RuntimeException: Exception reading entry from backingstore.
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