Re: On the issue of continuous query function monitoring in thin clients

Pavel, in fact, I don't think that the mentioned ticket has anything to do with the described problem. Mengyu Jing, What version of the Apache Ignite are you using? Could you please attach the configuration of the Ignite server node, thin client configuration and continuous query you are runni

Re: Assigning specific name to thin client

;>> to a client, but you can do that with a HashMap >>> >>> On Thu, Nov 11, 2021 at 6:20 PM Ganguly Gundeboina < >>> gangaiah.ya...@gmail.com> wrote: >>> >>>> Hi, >>>> >>>> Want to assign specific instance name to thin clients to monitor the >>>> clients. When thin client disconnected due to any reason, want to take >>>> manual action like starting the client. >>>> >>>> We are using 2.11, can we assign? >>>> >>>> Regards, >>>> Gangaiah >>>> >>> -- best regards, Pochatkin Mikhail.

Re: Need whelp with reading a list of binaryobjects from a field

this.name = name; > } > > public List getInspirations() { > return inspirations; > } > > public void setInspirations(List inspirations) { > this.inspirations = inspirations; > } > > public BigDec

Re: Need whelp with reading a list of binaryobjects from a field

Cache = > ignite.getOrCreateCache(“Sample”).withKeepBinary(); > > > > // this line is not returning list of binary objects, rather > returning desrialize objects > > List carInspirations = > binaryCache.get(“carname”).field(“inspirations”); > > > > } > > > > > > Tech > > Java 11 > > Ignite 2.14 > > > > > > Thanks > > D > > > -- best regards, Pochatkin Mikhail.

Re: Collocated storage of data that is distributed by Apache Kafka

Hi, Mikhail. Thanks for your questions! First of all I found some links in documentation which may help you. Apache Kafka Streamer | Ignite Documentation <https://ignite.apache.org/docs/latest/extensions-and-integrations/streaming/kafka-streamer> Apache Cassandra Acceleration With Apache

Collocated storage of data that is distributed by Apache Kafka

appropriate way of implementation of the HTTP load balancer, so that the REST call is automatically balanced to the node, which contains the  data for the sensor?   -- Best Regards, Mikhail

Re: How to set -DIGNITE_QUIET=false in service.sh?

E="$0" -cp "$IGNITE_LIBS" "$MAIN_CLASS" "$DEFAULT_CONFIG" >& "${IGNITE_LOG_DIR}"/ignite.out & * Where does *-DIGNITE_QUIET==true *comes from, I don't understand? From JVM_OPTS? On Wed, Feb 1, 2023 at 3:30 PM Айсина Роза Мунеровна

Re: How to set -DIGNITE_QUIET=false in service.sh?

Hi, you can use -v option for ignite.sh script in this case you will have *-DIGNITE_QUIET=false* On Wed, Feb 1, 2023 at 1:56 PM Айсина Роза Мунеровна < roza.ays...@sbermarket.ru> wrote: > Hola! > We run Ignite via service from DEB package and use service.sh to start it. > > In the service file we

Re: Kafka & Ignite AffinityFunction

Hi! Looks like you can't achieve it in Ignite 3 the same way as Ignite 2 (at least currently). Current implementation of affinity in Ignite 3 based on ignite-3/RendezvousAffinityFunction.java at main · apache/ignite-3 (github.com)

RE: Ignite upgrade 2.13.0 | Nodes getting crashed with classcastexception for same class with Critical system error

Hello. I did a little research on this issue. As I see it, between 2.9.1 and 2.13.0, the serialization backward compatibility of the GridDhtPartitionFullMap and GridDhtPartitionMap classes has not changed. Could you try to upgrade to some lower version, for example, try 2.12 2.11.1 2.10. It would b

RE: Failed to find security context for subject with given ID

Pavel, at first glance these are not related issues. Tianyue Hu, could you please specify the version of Ignite you are using, the server nodes configuration, and which Ignite mechanism you are using to insert data? -- Mikhail On 2021/11/19 06:37:47 y wrote: > Hello Igniters: > >

RE: Unable to join using thick client when authentication is enabled

Gangaiah, this exception means that authentication is disabled on the thick client and enabled on the cluster it was trying to connect to. Enable authentication on the thick client and the problem should be solved. -- Mikhail On 2021/11/17 17:56:13 Ganguly Gundeboina wrote: > Hi Ignit

RE: 'Security context isn't certain' exception during service deploy at node startup in 2.11.0

r the inconvenience. Ignite ticket - https://issues.apache.org/jira/browse/IGNITE-15951 -- Mikhail On 2021/11/18 04:38:59 Sergey Korotkov wrote: > Hello, > > We run into the problem migrating from Ignite version 2.8.1 to 2.11.0 > > If the authentication is enabled the ignite servi

Re: CAP Theorem

same cluster. For example, replicated in-memory cache with IGNORE partition loss policy(which is the default) will be AP cache, while persisted partitioned cache will be CP. On Tue, Dec 1, 2020 at 11:55 AM Mikhail Cherkasov wrote: > Hi Wolfgang, > > it's a very interesting quest

Re: CAP Theorem

vailability design goal. > > Regards, > > Wolfgang > -- Thanks, Mikhail.

Re: Increase the indexing speed while loading the cache from an RDBMS

rom: http://apache-ignite-users.70518.x6.nabble.com/ > -- Thanks, Mikhail.

Re: How to stop a node from dying when memory is full?

> and inconsistent as Colin suggested? > Is using persistence my only option to avoid OOM errors or do I have other > choices? > > Thank you for your help, > Dana > > > > > -- > Sent from: http://apache-ignite-users.70518.x6.nabble.com/ > -- Thanks, Mikhail.

Re: Ignite transactions

Hi Ashish, Yes, a transaction will be rolled back if it closed without a successful commit. Thanks, Mike. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: Warning in the logs - Writes are very slow

Hi Kumar, Ignite need to sync memory and disk time to time, if you write rate is bigger than disk speed that means Ignite will never able to sync memory and disk, that's why it starts to throttle your writes. So ignite added 1.6ms delay to each write, to be more accurate, not for each writes, but

RE: Security threat due to H2 admin privileges for Ignite

sorry, but it's public user list, it's not a paid helpdesk, it's important to keep conversations public, to allow other people google answers and resolve similar problems. I believe you problem can be described without hostnames, IP addresses, passwords or other sensitive information. -- Sent fr

Re: Ignite thread pool configuration

Hi Dominik, You don't need to configure thread pools manually, you should do this only if you have some particular problem and think that this can be resolved by changing pool sizes. Ignite in 95% of cases automatically configure correct pools' sizes. So you didn't understand it correctly: The p

RE: Security threat due to H2 admin privileges for Ignite

Hi Sriveena, I do no quite understand your concerns, Apache Ignite is just a java application which you can be run under any user account with restricted privileges. Could you please describe you question in more detail? >Which means user can execute any kind of system functions like filewrite,

Re: Zookeeper discovery with Ignite 2.8.0 - class NoClassDefFound

Hi Dominik, in new zookeeper 3.5.5 version part of classes were moved in new jar: https://mvnrepository.com/artifact/org.apache.zookeeper/zookeeper-jute/3.5.5 which is missed in Apache Ignite release. Please add it manually to lib folder. Thanks, Mike. -- Sent from: http://apache-ignite-users.

Re: TcpDiscoverySpi worker thread failed with assertion error

Hi the issue was fixed: https://issues.apache.org/jira/browse/IGNITE-11952 please check the latest version 2.8.0 Thanks, Mike. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: ignite 2.8.0 LRU eviction not work as expected.

Hi Bing, it works as expected: https://www.gridgain.com/docs/latest/developers-guide/memory-architecture/eviction-policies#on-heap-cache-eviction you set eviction only for on-heap, records will never be evicted from the off-heap memory, but only from on -heap. Please see my example: https://gist

Re: NullPointerException while cluster startup

Hello, Looks like it was fixed in GridGain Community edition: https://www.gridgain.com/resources/download Could you please verify 8.7.12 release? I bet I've found a required fix by it wasn't donated to apache yet, as soon as you confirm that 8.7.12 works fine I'll create a ticket to donate fix to

Re: How to configure primary data in memory and backup data on disk?

You can not do this, Apache Ignite even can use the same memory page to store primary records and backup records, however, don't worry, Ignite will keep in memory the most recently used memory pages: https://cwiki.apache.org/confluence/display/IGNITE/Ignite+Durable+Memory+-+under+the+hood#IgniteDur

Re: where to download odbc driver ?

Hi Ed, Please read the doc: https://www.gridgain.com/docs/latest/developers-guide/SQL/ODBC/odbc-driver#installing-odbc-driver you can find binaries here: %IGNITE_HOME%\platforms\cpp\bin\odbc\ Thanks, Mike. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: Nodes started on local machine require more than 80% of physical RAM

> but 4GB for container OS seems a bit much. Thanks for letting me know in any case! Absolutely agree with you that 4GB is too much, especially for the container environment. I think the person who wrote the check thought about big bare-metal installations with 128GB+ RAM, but you can just ignore

Re: Nodes started on local machine require more than 80% of physical RAM

Hi Stephane, Ignite has a check: it sums all JVM heaps and off-heap sizes for all nodes in the cluster that you run on the same host, and check if it takes more then 80% of host RAM OR *there's less then 4GB left*: https://github.com/apache/ignite/blob/ef6764e99c318a857ec92d6a270d8ef621cfde66/mo

Re: Ignite partitioned mode not scaling

cation which is shooting > requests to cache. > If benchmark is the bottleneck, we shouldn't see drop from 2600 to 2200 > when we go from 1 to 3 node cluster. > > On Fri, Jan 3, 2020 at 11:24 AM Rajan Ahlawat > wrote: > >> Hi Mikhail >> >> could you plea

Re: Ignite partitioned mode not scaling

ms > cache mode (partitioned)QPSread from sql tableread from sql table with > joinread from sql table > 1-node 2600 48 46 47 > 3-node 2190 50 48 49 > 3-node-1-backup 2200 55 53 54 > 5-node 2000 54 52 53 > 5-node-2-backup 1990 51 49 50 > -- Thanks, Mikhail.

Re: Search on a composite key

Hi Please read this doc: https://apacheignite.readme.io/docs/cache-queries this section describes exactly what you want. Thanks, Mike. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: ignite_backup_restore_query

I think you didn't copy the work directory, it can configured by IgniteConfiguration, by default it locates in $IGNITE_HOME/work -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: Ignite in GCP cloud

>1. you can use docker file from ignite kubernetus module: https://github.com/apache/ignite/blob/7b9cd0711b2ab16b8635cdaa588bfb3c03915f3c/modules/kubernetes/config/Dockerfile it's open source, all artifacs are in the module, so you it to build and host image locally. >2. You use too old documen

RE: building and running from source

Hi Scott, I think you need this doc: https://github.com/apache/ignite/blob/33ad0ad84a25a0d65ba408accfb1429cb96ff840/DEVNOTES.txt Let me know if it isn't sufficient to make the full build, we will fix it. thanks, Mike. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: Transactional cache in Atomic mode

>1) Batching always works better, however, I would benchmark single update vs batch update to prove this. >Would ignite itself make the implicit transaction /only if/ the explicit JAVA API for transaction has not been called? Right, if there's no definition for the transaction, there will be an

Re: Creating Dataset classNotFound exception

Hi Mahesh, The defined anonymous class( IgniteBiFunction) will be executed on the server side, so it should be deployed there first, you can do this manually, by extracting the class to distinct class, compile to jar and add to libs folder on the server side. Or you need to enable peer class loadi

Re: NearCache

Hi Greg, you can try to use OptimizedMarshaller: igniteConfig.setMarshaller(new OptimizedMarshaller()) however, this will lead to some limitations, which you can find in java doc of setMarshaller method. Thanks, Mike. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: Ignite Cache copy from another cache.

Hi Hemasundara, I think this should be implemented on the application level. when a new cache is ready, you need to change the cache name that your app uses to make all operations use a new cache, might be this will require some synchronization, it depends on your requirements. Thanks, Mike. -

Re: Thin client cannot retrieve data that was inserted with the regular Ignite client when using a composite key

Hi Roman, it looks like a bug for me, at least I don't see anything wrong about your test case. Also, I can reproduce the issue with the latest master version, so I filed a ticket: https://issues.apache.org/jira/browse/IGNITE-10960 Thank you for your report, Mike. -- Sent from: http://apache-i

Re: ignite_backup_restore_query

Hi, you can make snapshots manually: 1. deactivate cluster. 2. stop all nodes 3. copy work, wal and data storage directories 4. start cluster again. To make live snapshots of your cluster you can use 3rd party solutions like this one https://docs.gridgain.com/docs/data-snapshots Thanks, Mike.

Re: Transactional cache in Atomic mode

Hi >1) you can do all operations on transaction caches without defining an explicit transaction. However, even if you don't start transaction and for example put some data in transactional cache, ignite itself will make implicit transaction, so transactionCache.put("key", "value") -> will update y

Re: Unable to activate an ignite cluster with multiple hosts.

Hi, as I can see you created a cluster without ignite native persistence, so it already active. Activation is required only when you created cluster with persistence: https://apacheignite.readme.io/docs/distributed-persistent-store Thanks, Mike. -- Sent from: http://apache-ignite-users.70518.

Re: Recovering from a data region OOM condition

What ignite version do you use? Could you please share a reproducer with us? -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: read from igniteRDD and write to igniteRDD

Hi Mehdi I think first you need to read the following doc: https://apacheignite-fs.readme.io/docs/ignitecontext-igniterdd it describes how to properly setup Ignite cluster and create IgniteRDD, also it has examples. if you still have a question after reading the documentation, please describe yo

time series

there any out-of-the-box features for time series data in Ignite? Does it sound reasonable to implement rollover pattern in Ignite (like in ES)? Or there could be another options? [1] - https://www.elastic.co/blog/managing-time-based-indices-efficiently -- Best Regards, Mikhail

IgniteJdbcThinDriver statements accumulation

esired behavior for this ignite jdbc driver? -- Best Regards, Mikhail

Re: java.lang.ClassCastException: org.apache.ignite.internal.pagemem.impl.PageMemoryNoStoreImpl cannot be cast to org.apache.ignite.internal.processors.cache.persistence.pagemem.PageMemoryEx

Hi, could you please upload your configuration file, your screenshot is unreadable, furthermore, even if you send a high-resolution screenshot, it will be very difficult to copy-past configuration to file and check it locally. Please, just send us xml configuration that leads to the error. Thanks

Re: Querying Ignite caches in DBeaver

Hi, if you don't enable indexing for some cache, you can't read data from this cache via DBeaver, you can use one of the following way to read unindexed caches: 1) web console: https://apacheignite-tools.readme.io/docs/ignite-web-console ( scan query) 2)visor cmd: https://apacheignite-tools.readm

Re: Role of H2 datbase in Apache Ignite

Hi, Could you please formulate your question? Because right not your message looks like a request for google. I think the following article has answer for your question: https://apacheignite-sql.readme.io/docs/how-ignite-sql-works Thanks, Mike. -- Sent from: http://apache-ignite-users.70518.x

Re: Inconsistent data.

Hi Shrikant, What kind of requests do you mean? If you make affinity calls, ignite always sends the task to a node which has data, if new node doesn't have data, tasks just won't go to this node. Could you please explain in more details what you mean by requests? Thanks, Mike. -- Sent from: ht

Re: Setting performance expectations

Hi Daryl, Could you please share with us your benchmark? is my understanding correct, that you first select 400k records from DB, DB is remote and this takes 700ms, then you select all these 400k records from Ignite and now it takes 500ms, but in this case ignite is a local embedded node? Number

Re: How much heap to allocate

Hi Eugene, >For #2: wouldn't H2 need to bring the data into the heap to make the queries? > Or at least some of the date to do the group_by and sum operation? yes, ignite will bring data from off-heap to heap, sometimes if data set is too big for heap memory you need to set lazy flag for your qu

Re: How to use Affinity Function to Map a set of Keys to a particular node in a cluster?

Hi You can gather your data by @AffinityKeyMapped in one partition, but you can not force partition to be stored on some particular node. So you can use the same @AffinityKeyMapped for all data related to a particular city and this means all data about this city and/or related to this city would b

Re: Can wal archive be deleted?

Hi Ray, it's not safe to remove archive, in release 2.7 ignite will be able to do this: https://issues.apache.org/jira/browse/IGNITE-7912 ... Delete unused archived wal segments on each node: control.sh [--host HOST_OR_IP] [--port PORT] [--user USER] [--password PASSWORD] [--ping-interval

Re: Batch insert into ignite

Hi Sriveena, for data load you can try to use streaming mode for jdbc: https://apacheignite.readme.io/docs/jdbc-driver#section-streaming-mode it will provide faster insert operation compare to regular insert, also you can disable WAL: https://apacheignite.readme.io/docs/write-ahead-log#section-wal

Re: latency for replication

there no special API for this, I think you can do the following: 1. measure latency for FULL_SYNC mode = it consists of preparing data, sending it to primary, sending from primary to backups, sending a response from backup to the primary, sending a response back to the client. 2. measure latency f

Re: What is the difference between TcpCommunicationSpi & TcpDiscoverySpi ?

localportrange means the same for discovery and for communication, it defines the range from which node will choose a port to bind. For example, you have 47100 - discovery port and localportrange 100, it means that if you run 10 nodes, first will take 47100, second 47101 and so on, but this means t

Re: CRUD operation on Hibernate L2 Cache ?

Hi Monstereo, monstereo wrote > When I want to add new element to cache, it will also update the database. > When I want to update any element in cache, it will also update the > database. > When I want to delete any element in cache, it will also delete the > element > from database. > > How I

Re: Understanding SQL CREATE TABLE 'WITH' Parameters?

Hi >1) Do the settings of the parameters in the 'WITH' clause apply only to the >cached data? Or also to the persisted data? When you create a table by SQL, ignite will create a cache that with settings provided in 'WITH' clause. if by persisted data you meant ignite native persistence, then ye

Re: Same DDL should work table created thru DDL and table created thru Java API

Hi Naveen, If a table was created with a native api then it can be assessed only with schema prefix only. Thanks, Mike. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: AffinityKey Configuration in order to achieve multiple joins across caches

Hi, You can have only one affinity key in a class, so in your case, you need to choose the smallest table and made it replicated to avoid distributed joins. Another option is to use denormalization of you data, for example, to store Class B Class C in one class as one row. Thanks, Mike. -- S

Re: Affinity Key column to be always part of the Primary Key

Hi Naveen >If I do not have the affinity key column as part of the primary key, it does >not allow me to create the table itself. Could you please explain how it doesn't allow you create the table? is there any exceptions/errors messages? Thanks, Mike. -- Sent from: http://apache-ignite-u

Re: POSIX compliant NFS storage

Hi Network storages like EBS or EMC XTREMIO work really good with Ignite, however, NFS isn't the best from a performance point of view, it's something that should be tested. Thanks, Mike. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: Parallel execution in replicated mode

Hi Paulus, Replicate cache is supposed to have relatively small size because it can't be scale beyond min(nodes.ram), at least it was so before persistence was implemented. With a persistence that appears in ignite 2+ it now makes sense. However, you should send your proposal to dev list instead

Re: Cannot insert records into Apache Ignite cache from Apache Spark RDD

Hi, Could you please send us a reproducer that can be run locally? Thanks, Mike. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: atomicity of creating a new cache

Hi András, The described behavior doesn't sound Ok. Could you please send us a reproducer for this that can be run locally? Thanks, Mike. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: Unable to identify root cause for node failure

Hi, First, ignite will take all space that is configured in a data region. if there's more data then data region can store it will write data to a disk. However, it's about off-heap memory only, it doesn't use the heap for data storing(at least by default). How to configure data region size you c

Re: QueryEntities in Ingnite

>Does setting index of cache configuration solves the column Groupid not found problem. yes, it does. >Cause I am not setting fields explicitly in QueryEntity. Is it required to set fields in QueryEntity when annotations are used in Pojo? you must choose only one approach to describe an object f

Re: Unable to identify root cause for node failure

Hi Rahul, at 12:25:03 first node detected that second one is failed: [12:45:03,251][INFO][exchange-worker-#182][GridCachePartitionExchangeManager] Skipping rebalancing (nothing scheduled) [top=AffinityTopologyVersion [topVer=3, minorTopVer=0], evt=NODE_FAILED, node=bbdd7792-1309-4941-a7ad-05ed642

Re: QueryEntities in Ingnite

Hi, there's two way to index objects in cache: 1. by annotations: https://apacheignite.readme.io/docs/cache-queries#section-query-configuration-by-annotations 2. by QueryEntity: https://apacheignite.readme.io/docs/cache-queries#section-query-configuration-using-queryentity But you can't mix both,

Re: And again... Failed to get page IO instance (page content is corrupted)

Hi Sergey, The release of 2.4 should be soon, in a week or couple, however, there's no strong schedule for Apache releases. Could you please share a reproducer for the issue? Might be you can share a storage on which the issue can be reproduced? Thanks, Mike. -- Sent from: http://apache-ignit

Re: Moving a folder when deployed on Kubernetes

Hi, Your question has been asked before: http://apache-ignite-users.70518.x6.nabble.com/Web-Console-on-Kubernetes-Cluster-td18591.html Unfortunately, there's no docker image for web agent, so you need to prepare and install it manually like any other regular java application. thanks, Mike. --

Re: BinaryInvalidTypeException in IgniteCallable

Hi Looks like you forgot to add the exception that you to the mail. Could you please send it to us? Thanks, Mike. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: Table creation in Ignite

Hi Prasad, >Does it mean that it stores the data in table as well as in key value cache? I meant to say that does it duplicates the data? There's no data duplication, everything is stored in ignite cache only. SQL is just another way access to data. Plus SQL provides indices. >In which format

Re: Failed to parse query

Hi Stéphane, I believe a good description of the error you will find in server node log. You need to specify a schema for your query, like this: insert into "cache_name".device(id, secret, updated_at, created_at) there's the existent ticket for error message improvement, I added this thread a

Re: Write ahead log and early eviction of new elements

Hi Raymond, >I understand when I add an element to a cache that element is serialized, >placed into the local memory for the cache on that server and then placed >into the WAL pending checkpointing (merging into the persistence store). First, the update will be written into WAL and only then in

Re: a2cf190a-6a44-4b94-baea-c9b88a16922e, class org.apache.ignite.IgniteCheckedException:Failed to execute SQL query

Hi Rahul, Could you please share a log from a node where SQL failed? or even better to share logs from all nodes, including client nodes. Does YARN limit resources like CPU and memory for Ignite instances? Or each Ignite instance on the host can see and use all CPUs? Thanks, Mike. -- Sent fr

Re: Failed to activate cluster - table already exists

Hi Thomas, Looks like you can reproduce the issue with a unit test. Could you please share it with us? Thanks, Mike. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: NPE from the native persistence enable node

Hi Aaron, Can you always reproduce the issue? Might be you have a reproducer for this issue? I created a ticket: https://issues.apache.org/jira/browse/IGNITE-7458 but I don't think that it will be fixed without a reproducer, so it will be great if you'll provide one, I'll attach it to the tick

Re: Memory leak in GridCachePartitionExchangeManager?

Hi I'll try to reproduce the issue and create a ticket if it's confirmed. Could you please confirm that you use the latest 2.3 ignite? if not, could you please specify ignite version that you use? Thanks, Mike. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

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

Hi Matija, Did you have time to prepare a reproducer? Thanks, Mike. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: Memcached doesn't store flags

Hi Wolfram, Looks like it's broken, we parse those type bits in a request, but don't set in for a response. I created a ticket for this problem: https://issues.apache.org/jira/browse/IGNITE-7028 Thanks, Mike. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: IOException: Bad file descriptor - while running application on remote node

Hi Rajarshi, I see that you use KafkaProducer in you compute job. Are you sure that KafkaProducer can be safely serialized on one host and deserialized on a remote host and deserialization version can be safely on the remote host? I think you need properly create/obtain KafkaProducer on a remote

Re: Only one node has a high number of SystemExecutor CompletedTask

Hi as you already noted, ignite cluster has a special node - coordinator, the oldest node in a cluster is coordinator node: ignite.cluster().forServers().forOldest().node() In case of creation/destroying a cache, coordinator needs to coordinate this process and notify each node about cache crea

Re: Failed to connect to address issue

Hi looks like you didn't close all ignite instances, try to terminate all ignite processes and re-try you run( killall java ). Thanks, Mike. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: Scan query failed if set deploymentMode to Private

Hi, I reproduced the issue too, a ticket is created: https://issues.apache.org/jira/browse/IGNITE-6960 Thanks, Mike. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: Initial query resent the data when client got reconnect

Hi, Could you please show examples how this is implemented in system mentioned by you: elastisearch,mango? I'll create an enhancement request for this feature. Thanks, Mike. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: IgniteInterruptedException: Node is stopping

Hi Hyma, looks like your job takes too much time, you hit some timeout and spark killed your jobs. I don't see any other errors or warnings from your logs, it's very likely that you need to increase some time out in spark. thanks, Mike. -- Sent from: http://apache-ignite-users.70518.x6.nabble.

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

Hi Matija, Nested select is supported by Ignite, could you please share a small pom based reproducer for the problem, it could be a configuration problem, but there's not enough information to help you. Thanks, Mike. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: binary object affinity collocation

Hi, You have a mistake in configuration: "uid" must be a part of a key, a custom affinity can't be done for entry filed, only for key field. So you need to make a complex key for IdMatching, the one part of it must be "uid". Thanks, Mike. -- Sent from: http://apache-ignite-users.705

Re: Failed to connect to address issue

Hi, could you please share the full logs from all your nodes? Thanks, Mike. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: JDBC Client

Hi again, >1. If use thick driver, can we use JDBC connection pooling? no, you should not use connection pools in this case. ignite client which is used by the thick driver is concurrent save and can be used by multiple threads and communicate with any server from the cluster. >2. How/What is t

Re: Scan query failed if set deploymentMode to Private

Hi, it sounds like a bug, I'll try to reproduce it and if it's so, I'll create a ticket for this. Thanks, Mike. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

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 tr

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: 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/

Re: Deserializing to an object from a request based on SqlQueryField.

Hi, did you mark B field with @QuerySqlField? I'm just checked you case and it works fine for me, but I used java while you I guess you c#, don't you? Thanks, Mike. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: Logging query on server node sent from client node

Hi, did you enabled events in configurations: https://apacheignite.readme.io/docs/events#section-configuration ? Thanks, Mike. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/

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