Re: JDBC Client

Hi Mike, Thanks for the reply and explanation. I have further curious question. 1. If use thick driver, can we use JDBC connection pooling? 2. How/What is the process to backup the data in Apache Ignite? 3. Let's say initially I start Apache Ignite with only one node (cache mode = replicated,

Scan query failed if set deploymentMode to Private

Hi there, I found a issue that if we set deploymentMode to Private and using ScanQuery for in InitialQuery. The inital query will failed for *Class not found* error. Meanwhile, the remoteFilter and LocalListener works fine. After change ScanQuery to SQLQuery, everything works fine. Is this a

WEBINARS: Apache Ignite Essentials for Architects and Java Developers

Igniters, I’m pleased to invite all of you to a series of webinars that will introduce you to the fundamental capabilities of in-memory computing platforms such as Apache Ignite. That will be a mix of theory and practice. A lot of code examples are waiting to be shown so that you can apply

Re: AffinityKey by java configuration

Sumanta, This can be specified via CacheKeyConfiguration: -Val -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: Using event to reconnect spring created cache client to server

guil, could you share your solution? Many thanks -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: Initial query resent the data when client got reconnect

Alexey, thanks for reply. I wondered does Ignite will set a incremental value for incoming data so can help people to do stuff like you said? You know for isolate data pushers are not easy to generate a unique incremental value. I know many distribute data store,like elastisearch,mango has those

Re: Meetup tonight in Santa Clara CA: "In-Memory Computing Essentials for Java Developers"

Tom, Thanks for promoting the workshop! Igniters, minor correction, that’s gonna be the first 2.5 hours advanced workshop on Ignite internals and capabilities. Join me at 6.30 PM today if you’re Silicon Valley. By the end of the workshop the you will learn how: • Configure and deploy Apache

"select ... from (select ... from) where" doesn't work

Hello everyone, Hibernate often generates this kind of nested from queries, if you have a complex hierarchy of entities: SELECT mtoplevelt0_.definition_id AS definiti1_5_0_, mtoplevelt0_.entity_id AS entity_i2_5_0_, mtoplevelt0_.m_owner_id AS

Re: ComputeTask is including Nodes for ComputeJobs prematurely

No. There are things in the general application that are not yet initialized. It is essentially a chicken-and-egg problem. I need to start Ignite, and do various other things before I am ready to take load. But as soon as Ignite is started -- it starts to take ComputeJobs. We really need a way to

Re: Reason for using JVM Instance for Ignite C++ Driver

Just in case, in the next Ignite version you’ll be able to create thin C++ clients by communicating to the cluster via a raw low-level socket based protocol. — Denis > On Nov 16, 2017, at 5:45 AM, kotamrajuyashasvi > wrote: > > Hi > > My doubts got cleared >

Re: JDBC Client

Hi Miau, 1. no, thin client won't reconnect to cluster, you need to handle an exception and re-connect to other servers manually. I create a ticket to improve this part: https://issues.apache.org/jira/browse/IGNITE-6942 2. Thick driver uses ignite instance under the hood, so ignite client will

AffinityKey by java configuration

Hi, Can you tell me how to specify a different attribute (other than key) can be specified as affinity key? I cannot use the annotation in my entity class. Is there a way to do it using CacheConfiguration and related class? Can I just not set the attribute name as string which will be used as

回复： what did this log indicate?

@dkarachentsev: My scenario: Ignite 2.2, 10 server nodes. The above bug said it's from GC pause in client side, however I found it in the server node and No full GC in that server node occured.I am afraid whether too many broadcast messages could block data rebalance or not. thank

Re: How can I get Ignite security plugin to work with JDBC thin client?

I've create a ticket [1] for this issue. [1] https://issues.apache.org/jira/browse/IGNITE-6941 - Regards, Andrew. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: How can I get Ignite security plugin to work with JDBC thin client?

I've create a ticket [1] for this issue. [1] https://issues.apache.org/jira/browse/IGNITE-6941 - Regards, Andrew. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: Memory utilization of Indexes in ignite

Hi Tejas, Ignite will store indexes in off-heap, but indexes can't be swapped to a disk. However in the latest version of ignite, disk storage was implemented and indexes can be saved on the disk, but it's unlikely because indexes are hot data that should be kept in memory. Thanks, Mike. --

Re: Using event to reconnect spring created cache client to server

Also you can annotate your Listener or Filter class by IgniteAsyncCallback annotation. In this case a callback will be called from other thread. On Thu, Nov 16, 2017 at 7:13 PM, ezhuravlev wrote: > gunman524, I didn't say anything like that. > > I said that if you want

Re: Using event to reconnect spring created cache client to server

gunman524, I didn't say anything like that. I said that if you want to access cache from CQ, you need to start a new thread Evgenii -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: what did this log indicate?

Hi again, This looks quite similar to your issue, and it was fixed in 2.3 [1]. Check it out. [1] https://issues.apache.org/jira/browse/IGNITE-6071 Thanks! -Dmitry -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: what did this log indicate?

Hi, Try to enable paired connections [1]. [1] https://ignite.apache.org/releases/latest/javadoc/org/apache/ignite/spi/communication/tcp/TcpCommunicationSpi.html#setUsePairedConnections(boolean) Thanks! -Dmitry -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: Failed to run map query remotely

Hi, Could you please provide the full stack trace? the best if you can upload the full log. Thanks, Mike. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

JDBC Client

Hi, I am beginner with Apache Ignite and have few questions related to JDBC. 1. Let's say I have 2 node in 2 different machine (cache mode = replicated, native persistence is turned on). I want to connect to the Apache Ignite server using JDBC thin client. In the JDBC thin client URL, I only can

Re: How can I get Ignite security plugin to work with JDBC thin client?

Yes, but can you please open another IGNITE ticket to be resolved hopefully in 2.4? -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: Using event to reconnect spring created cache client to server

The solution that I shared earlier is recommended I think. Regards, Evgenii 2017-11-16 17:31 GMT+03:00 Guilherme Melo : > Is there a recommended pattern for reconnecting continuous queries after a > disconnect event? > > Thanks ! > > Cheers, > > Guilherme Melo >

Re: Using event to reconnect spring created cache client to server

Is there a recommended pattern for reconnecting continuous queries after a disconnect event? Thanks ! Cheers, Guilherme Melo www.gmelo.org On 16 November 2017 at 20:25, ezhuravlev wrote: > It's not recommended to access caches from listeners. It's a general >

Re: Using event to reconnect spring created cache client to server

what did this log indicate?

those logs was from the node (192.168.34.189), which accepted a ton of incoming communication connection frequently. Are there some errors occured in this node? how to handle this? thanks.

Re: Reason for using JVM Instance for Ignite C++ Driver

Hi My doubts got cleared Thanks. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: Ignite 2.3.0 hangs in startup

Looks like you witnessed this issue: https://issues.apache.org/jira/browse/IGNITE-6555 Which is already fixed and will be available in 2.4 release Evgenii -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: Ignite ODBC Driver v/s Ignite C++ driver

Hi Thanks for your response. Actually I'm working on a C++ project where multiple C++ processes run in parallel. Each process should connect to Ignite Server initially and start a transaction. Cassandra is used as persistent store(The main reason to use ignite on top of Cassandra is for the

Re: How can I get Ignite security plugin to work with JDBC thin client?

Hi Caleb, JDBC Thin Client doesn't supports authorization for now. On Wed, Nov 15, 2017 at 6:54 PM, calebs wrote: > Hi Valdimir, > > There are at least two problems that I've found here. The first is the > query > execution engine as you have just pointed out. The second

Re: Using event to reconnect spring created cache client to server

It's not recommended to access caches from listeners. It's a general practice to create a new thread after you get an event. Evgenii -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: Apache Ignite binary type invalidation

Hi, Ignite really caches metadata but restarting cluster clears the cache. If you want to change field type at runtime (without restarting the cluster), then you need to first remove field and then add the field something like: BinaryObject o = binary.builder("MyType").removeField("f").build();

Re: Initial query resent the data when client got reconnect

Hi, Initial query just gets the data according to the query. It will always bring all data if you query all data. You need to manually control what data you want your initial query to get. For example, if your key is incremental (like numeric ID or timestamp) then you could save the last

Failed to run map query remotely

Hi, guys I meet a error when using SQL to query cache. It happens when Ignite server restart after OOEM issue. Could you help me figure out why this happens? [2017-11-16T14:59:36,937][ERROR][client-connector-#45][JdbcRequestHandler] Failed to execute SQL query [reqId=0,

Re: Reason for using JVM Instance for Ignite C++ Driver

Hi, This is because Ignite C++ is not just thin client. It is actually a node, that can be a server node and can join topology. You can actually store data on it, run queries and compute jobs over it, and so on. Does it answer your question? Best Regards, Igor On Thu, Nov 16, 2017 at 10:08 AM,

Re: Ignite ODBC Driver v/s Ignite C++ driver

Hi, Ignite C++ indeed starts JVM process, but it is not just client, it is basically ordinary Ignite node, that can be client or server and can do in cluster almost anything, that Java Ignite node can, although, C++ still does not have all the features that Java API has. So, basically, C++ allows

Re: "Duplicate field ID" Error when register a contentious query

Hi, Looks like your listener is statefull and holds a connection object that is transfered to remote node. Try to move connection to out of listener. On Thu, Nov 16, 2017 at 3:42 AM, gunman524 wrote: > Hi guys, > > I met a issue that "Duplicate field ID" Error occurs when

Re: Ignite 2.3.0 Console logging handler is not configured error in start-up

Hi Sumanta, Please have a look at https://issues.apache.org/jira/browse/IGNITE-6828 This error message comes from Spring framework (org.springframework.data:spring-data-commons). It is not Ignite message and does not affect Ignite logging, so you can just ignore it. To avoid such message you