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Java Enterprise Q&A » quartz » cluster 

1. What exactly can happen when a cluster is not clock-synched?    forums.terracotta.org

> Never run clustering on separate machines, unless their clocks are synchronized using some form of time-sync service (daemon) that runs very regularly (the clocks must be within a second of each other). That is a scary warning. What exactly can happen when the clocks are not completely synched? And does this really only affect a cluster? How about an RMI ...

2. Load balancing on Cluster    forums.terracotta.org

Yes, the load balancing feature is automatic. It balances with a more-or-less random distribution of job execution - first node to get to it gets it. So it doesn't perfectly balance. If you have a setup with just a couple jobs, you might see them always run on one node. If you have lots of jobs, you'll see fairly even distribution. ...

3. Excluding Server in Clustered Environment    forums.terracotta.org

Hi, I have a quartz cluster of three machines. Let's say that I have a job that I run daily, but on two of the three could run it. For Example: MachineA MachineB MachineC All three machines belong to the cluster. For most jobs, any of the three can run the jop. However, for JobZ, which runs nightly, I want to ...

4. Question about clustering function    forums.terracotta.org

5. Clustering in quartz with our own architecture    forums.terracotta.org

Hi all, We've built our own distributed architecture utilizing Apache Zookeeper and Cassandra with POJO java processes. We need a distributed job processing system that works within the system we've already built. I've used Quartz before and it has all the features we need. However, our use cases is a little different, and i could use some guidance. We have the ...

6. Quartz.NET clustering question    forums.terracotta.org

Thanks. I do understand that for clustering; I require to use the same set of tables. But I have multiple applications that use Quartz.NET across my application. In that case; can all these applications; use the same set of tables? I'm trying to avoid creating multiple set of tables for every application.

7. Mixed applications participating in a cluster    forums.terracotta.org

I'm just trying to confirm my suspicions here. I've got a quartz cluster setup across multiple machines. There are a few different categories of application running on these machines. I have some triggers that I want to be able to run on any machine and others that are only meant for one category. This doesn't work because you can't be sure ...

8. Quartz clustering strategy    forums.terracotta.org

Hello, We are using quartz 1.8 for job scheduling. However, in our case, the intent of quartz usage is not that of scheduling quartz job like cron would. Which is the default case. Rather, we are using it to make asyn calls to the application server. Here's the flow: CLIENT -> (calls) -> Server API -> (schedules job for now) -> ...

9. Error managing cluster after server upgrade from JDK1.5 to 1.6    forums.terracotta.org

Hi all, Recently, my server has been upgraded from JDK 1.5 to JDK 1.6. By running time by time, my server encounters errors on managing cluster. I have tired to upgrade the quartz version to 1.6.6. However, another error appears when starting the server. "Error handling misfires: Couldn't retrieve trigger: [jcc][10150][10300][3.50.152] Invalid parameter: Unknown column name PRIORITY" I deeply appreciate if ...

10. Clustering    forums.terracotta.org

I have quartz clustering enabled for my application and I had a question....lets say I have 2 nodes and I have a cronjob which runs every 2 mins....so I understand that the way clustering works, every two mins, only one instance of the scheduler would pick up that job...but what if there was a case where the execution of that job ...

11. Clustering Failover    forums.terracotta.org

I am using Quartz for scheduling the certain jobs in my project. My scenarios is i) Fetching data from database ii) Interacting with external applications ii) Update db based on the result from external applications We are using Clustering as this is critical application. Using clustering configuration in quartz org.quartz.jobStore.isClustered = true org.quartz.jobStore.clusterCheckinInterval = 20000 and request recovery is jobDetail.setRequestsRecovery(true); We ...

12. Error Managing Cluster    forums.terracotta.org

Frequently i am exprementing the below mentioned exceptions.. The jobs are running fine until this exception occurs. (JobStoreSupport.java:3826) ERROR org.quartz.impl.jdbcjobstore.JobStoreTX - ClusterManager: Error managing cluster: Failure identifying failed instances when checking-in: Closed Statement org.quartz.JobPersistenceException: Failure identifying failed instances when checking-in: Closed Statement [See nested exception: java.sql.SQLException: Closed Statement] at org.quartz.impl.jdbcjobstore.JobStoreSupport.findFailedInstances(JobStoreSupport.java:3282) at org.quartz.impl.jdbcjobstore.JobStoreSupport.clusterCheckIn(JobStoreSupport.java:3335) at org.quartz.impl.jdbcjobstore.JobStoreSupport.doCheckin(JobStoreSupport.java:3191) at org.quartz.impl.jdbcjobstore.JobStoreSupport$ClusterManager.manage(JobStoreSupport.java:3820) at org.quartz.impl.jdbcjobstore.JobStoreSupport$ClusterManager.run(JobStoreSupport.java:3856) Caused by: java.sql.SQLException: ...

13. Getting org.quartz.ObjectAlreadyExistsException in clustered env.    forums.terracotta.org

Hi, I am getting org.quartz.ObjectAlreadyExistsException in clustered env. with following settings, Using: Weblogic Server with MS SQL server Quartz properties as, props.put("org.quartz.scheduler.instanceName", "RxSchd"); props.put("org.quartz.scheduler.instanceId", "AUTO"); props.put("org.quartz.scheduler.rmi.export", "false"); props.put("org.quartz.scheduler.rmi.proxy", "false"); props.put"org.quartz.scheduler.threadsInheritContextClassLoaderOfInitializer", "true"); props.put"org.quartz.jobStore.class", "org.quartz.impl.jdbcjobstore.JobStoreTX"); props.put"org.quartz.threadPool.class", "org.quartz.simpl.SimpleThreadPool"); props.put("org.quartz.threadPool.threadCount", "25"); props.put("org.quartz.threadPool.threadPriority", "5"); props.put("org.quartz.jobStore.driverDelegateClass", "org.quartz.impl.jdbcjobstore.MSSQLDelegate"); props.put("org.quartz.jobStore.tablePrefix", "RX_"); props.put("org.quartz.jobStore.dataSource", "qDS"); props.put("org.quartz.dataSource.qDS.jndiURL", "qDS"); props.put("org.quartz.jobStore.isClustered", "true"); props.put("org.quartz.jobStore.clusterCheckinInterval", "2000"); Steps running: 1. Started scheduler instance at Server 1 succesefully ...

14. Quartz causing intermittent deployment failures in clustered environment    forums.terracotta.org

Hi All, I'm running a 2 node cluster to which my Spring/ Quartz based application is deployed. I have configured Quartz to think it's in a clustered environment (config below) however I frequently get the following error upon deployment of the application to the cluster. Code: org.quartz.impl.jdbcjobstore.LockException: Failure obtaining db row lock: ORA-00054: resource busy and acquire with NOWAIT specified [See ...

15. How to define unclustered tasks in a Quartz cluster    forums.terracotta.org

Hi, I need to deploy a webapp containing quartz jobs to a cluster. I have read about the configuration of a quartz cluster, however it is not clear to me how I can define jobs that are node-specific, i.e. that need to run on each node, oblivious to the jobs that are running on the other nodes of the cluster. Some ...

16. Internals Of Quartz Clustering    forums.terracotta.org

Hi, Can someone explain how does quartz clustering work internally?? All I know is in qrtz_scheduler_state table all the active nodes are present. But how does the load gets distributed..Who is doing this.. 1.Lets say Job1 triggers 100 Job2's and 100Job 3's. I know that those 200 diff jobs will get shared by all the nodes in cluster..But how does that ...

17. Quartz clustering    forums.terracotta.org

Hi, As per quartz documentaion, clustering is used for load-processing. I believe it should improve the perfromance if we have thousands of jobs to be triggers every few min. I am using this link http://www.quartz-scheduler.org/docs/configuration/ConfigJDBCJobStoreClustering.html and it has been mentioned that use of below properites : org.quartz.jobStore.isClustered = true org.quartz.jobStore.clusterCheckinInterval = 20000 org.quartz.scheduler.instanceId = AUTO I would like to know how ...

18. Quartz on a cluster - some questions    forums.terracotta.org

Hello, We are using quartz (ram job store) with a grails app on a single machine. We are now required to move to a cluster of 2 for HA. I understand there are 2 options to do that: 1. JDBC store 2. using TC server my questions are: 1. regarding JDBC store - does this work well with ms sql server? ...

20. problem with quartz in clustered env    forums.terracotta.org

I am running quartz scheduler(same logical scheduler) on 2 nodes in a cluster. I want my job to run exactly once on one of teh nodes. I login to node A schedule my job to run at a later time and log out. Then I stop node A. I expect the job to run on Node B when it is time ...

21. Quartz 1.8.4 Clustering    forums.terracotta.org

Hi there, I would like to understand quartz clustering deeply. I have multiple jobs, let's say these are job1, job2, job3, which must to be scheduled to run on a cluster that contains two nodes: node1, node2. job1 should be executed every 5 minutes job2 should be executed every 10 minutes job3 should be executed every evening at 19.00 As far ...

22. Quartz Clustered - set up the URL.    forums.terracotta.org

Hi All, I have been able to get Quartz to work in a clustered environment. Now, the problem i'm facing is we have a development environment which points to a particular url for : org.quartz.dataSource.myDS.URL = jdbc:oracle:thin:@xyz:1521/ABC Now, for deployment I want it to point to a different URL. How can i achieve this since quartz.properties is already bundled into a ...

23. Cluster connection    forums.terracotta.org

If each cluster node is configured to have scheduler started, then you will incur "max" 25 DB conn on your DBs. Notice I said "max", you can have your db pooling set with min values and idle count to low, then it might not hit the 25 when there is no activities.

24. Why XMLSchedulingDataProcessorPlugin scanning files feature doesn't work in a clustered env?    forums.terracotta.org

Hi, I want to keep my job configuration in a file and be able to modify it and see the changes in the scheduler immediately, also I want to have multiple instances of the scheduler in a cluster. The XMLSchedulingDataProcessorPlugin looks like the perfect solution except for one note that I saw in the code: "The periodically scanning of files for ...

25. Error in running Quartz cluster v2.0.1    forums.terracotta.org

org.quartz.scheduler.instanceId = AUTO org.quartz.scheduler.rmi.export = false org.quartz.scheduler.rmi.proxy = false org.quartz.scheduler.wrapJobExecutionInUserTransaction = false org.quartz.threadPool.class = org.quartz.simpl.SimpleThreadPool org.quartz.threadPool.threadCount = 100 org.quartz.threadPool.threadPriority = 5 org.quartz.threadPool.threadsInheritContextClassLoaderOfInitializingThread = true org.quartz.jobStore.misfireThreshold = 60000 #org.quartz.jobStore.useProperties = true #org.quartz.jobStore.class = org.quartz.simpl.RAMJobStore org.quartz.jobStore.class = org.quartz.impl.jdbcjobstore.JobStoreTX org.quartz.jobStore.driverDelegateClass = org.quartz.impl.jdbcjobstore.oracle.OracleDelegate org.quartz.jobStore.dataSource = myDS #org.quartz.dataSource = myDS #org.quartz.jobStore.tablePrefix = QRTZ_ org.quartz.jobStore.isClustered = true org.quartz.jobStore.clusterCheckinInterval = 7500 org.quartz.dataSource.myDS.driver = oracle.jdbc.driver.OracleDriver org.quartz.dataSource.myDS.URL = jdbc:oracle:thin:@IP:1521:cdb org.quartz.dataSource.myDS.user ...

26. Getting erros while trying to change system to work in - Cluster Mode    forums.terracotta.org

bravo24 neo Joined: 11/21/2011 16:01:59 Messages: 4 Offline Hi All, Currently the system in running on only one machine. That's why sometimes there is too much load on system because of some heavy Quartz Jobs. I want to make the change so that system will run on two different machines. I am trying to change the configuration in Cluster Mode. So, ...

27. Quartz Cluster FailOver    forums.terracotta.org

sarangr neo Joined: 12/07/2011 03:36:34 Messages: 5 Offline Hi, I am attaching the scheduler class and quartz.properties file. Schenario: In WAS cluster Env. I have two nodes. Both are active nodes. While I am trying to schedule my job. it is executing on any one node. eg. it is executing on node1. If I stopped the node1, scheduler should be start ...

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