[jira] [Created] (IGNITE-4205) CassandraCacheStore should start IgniteThread threads in loadCache() method

[Anton Vinogradov (Jira)]

Valentin Kulichenko created IGNITE-4205:
-------------------------------------------

             Summary: CassandraCacheStore should start IgniteThread threads in loadCache() method
                 Key: IGNITE-4205
                 URL: https://issues.apache.org/jira/browse/IGNITE-4205
             Project: Ignite
          Issue Type: Bug
          Components: cache
    Affects Versions: 1.7
            Reporter: Valentin Kulichenko


{{CassandraCacheStore.loadCache()}} method starts a generic thread pool for parallel data load. Threads in this thread pool can't deserialize Ignite internal objects (e.g. {{IgniteKernal}}) which can cause unexpected behavior. Here is one of the scenarios:
* There is column in Cassandra which stores an object as BLOB using {{JavaSerializer}}.
* {{CacheConfiguration.storeKeepBinary}} is {{true}}.
* When an object is saved, it's passed to the store as an instance of {{BinaryObject}} which is converted to a byte array and saved in Cassandra.
* When the same object is loaded in {{loadCache}}, the store takes the byte array and tries to convert it to {{BinaryObject}}. But it can't because this implies calling {{IgnitionEx.localIgnite()}} from non-Ignite thread.

To fix this we need to provide a thread factory that will create instances of {{IgniteThread}} and use it in the pool that loads the data.

Most likely the same issue exists in {{CacheAbstractJdbcStore}}.

And in general, any threads created by Ignite internals should be {{IgniteThread}}-s. This should be revisited.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)