Alternatives to OQL (select customerId, sum(qty) from /TradeCache group by...
What are some of the solutions used to get the 'group by' functionality out of data cached in Gemfire given that it does not currently support this?
View ArticleJava heap space occurs by problem with Gemfire Region
Hi, I have a big problem with my application.This is working with 2 servers (Gemfire) in cluster and a thread procces that is running every five minutes, in this thread there is a procces that make a...
View ArticleGemfire Authentication - Performance Impact
We enabled authentication in our application and are seeing a drop by 25% in system performance. We have two clients in the DS. One which publishes the data(using putall) and another is only...
View ArticleWrite-behind scenario
We are planning to use a database as the system of record beneath Gemfire 7 with write-behind on any creates or updates in our regions (both partitioned and replicated) and read through on cache...
View ArticleInterestRegistrationListener not firing on client cleanup
Hi, GF: 6.6.4.1.Use case: durable client, server side ClientSession.registerInterest and making use of InterestRegistrationListener. It seems that InterestRegistrationListener.unregisterInterest is not...
View ArticleGemFire Hangs tcServer Startup in SpringTrader
Hello,I'm trying to get SpringTrader to work in a clustered environment. Changing the bind-address from 127.0.0.1 to the IP of the host results in the below messages in catalina.out. Any ideas? Also...
View ArticleEntry destroyed exception
Hi, In application, When replicated region is used, some of the entries are scheduled to expire in future. Currently ExpirationAttributes used to expire the entry in future. I beleive this attribute...
View ArticleDatabrowser on client not able to connect to Gemfire 7
I have successfully installed gemfire 7 on my cache server and able to start the locator process with jmx-manager.i am also able to connect to that jmx-manager through the gfsh console.But with new...
View ArticleDelete Overflow files
Hi I have a region configured to overflow to disk based on memory limits. We're running tight on disk space now and I'm looking for files to delete. looking at the documentation it appears only the...
View ArticleTransaction and ALLOW_PERSISTENT_TRANSACTIONS
Hi, There is not much documentation available about ALLOW_PERSISTENT_TRANSACTIONS. Is it safe to use? can't we use persistence and transaction together? What is the impact if...
View ArticleDocument about region attribute refid.
Hi, Where can I find list of all possible values for refid. I came across quite a few attributes like REPLICATE, CACHING_PROXY, PARTITION. But I could n't find list of all possible values and...
View ArticleThe function is not registered for function id TopTenListFunction
Hi, I am trying to get up and running function related sample. Usually it works. But I need to ensure, function always executed strictly in the server. Hence I have two different JVM 1) Server VM...
View ArticleLIKE query with parameter binding
Using parametr binding with LIKE query returns an empty result set,even if the match should succeed.Example : SELECT * FROM /people WHERE name LIKE 'alex%' returns all People whose name start with alex...
View ArticleGemFire Not Reading gemfire.properties As Expected
Hello,I'm working with the SpringTrader reference application and am having trouble getting it to read the gemfire.properties file. Environment : CentOS 6.3, tcServer 2.7.2 (tomcat 7), jdk 1.6.0_38 The...
View ArticleProblem starting Gemfire 7 locator
I'm attempting to start a single Gemfire 7 locator on a CentOS VM and the startup seems to be hanging at some point. I'm using the following command for startup: gemfire start-locator -port=20003 After...
View ArticleDetecting existing DS or Cache in VM
There was a thread on this from July but I'm unable to reply to it anymore so here goes. http://communities.vmware.com/thread/411610 I would also like an answer to this. The problem seems to be with...
View ArticleTesting a custom PdxSerializer
I've written a custom PdxSerializer implementation to use in my Gemfire cache and I was wondering how I can get Gemfire to invoke my custom serializer in my integration tests. I have a local Gemfire...
View ArticleGemfire Error -Since a cache already existed a pool should also exist
I am getting the below error on client side while creating a cache object via ClientCacheFactory. Caused by: java.lang.IllegalStateException: Since a cache already existed a pool should also exist....
View ArticleGemFire integration with Informatica
Hi,I am intetersted in hearing any use cases of people integrating GemFire with Informatica. I can imagine it would be used to provide high performance ETL for example. There maybe other use cases out...
View ArticleGemFire 7, PDX and ClassCastException
I'm running a fairly simple region. Or I thought I was...Key is a Long. Value is a custom class. Inside value class is a few member variables and a set of attributes modelled as a TreeSet (which is...
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