# \#cassandra **URL:** https://community.temporal.io/tag/cassandra/15.md [Latest](https://community.temporal.io/latest.md) · [Categories](https://community.temporal.io/categories.md) · [Tags](https://community.temporal.io/tags.md) --- ## [numHistoryShards recommendation for Cassandra](https://community.temporal.io/t/numhistoryshards-recommendation-for-cassandra/19800)
**Author:** [@parul\_rawat](https://community.temporal.io/u/parul_rawat)\ **Replies:** 1\ **Last updated:** [September 19, 2026, 3:59pm UTC](https://community.temporal.io/t/numhistoryshards-recommendation-for-cassandra/19800 "2026-09-19T15:59:01Z")
Hi all, Can anyone help us come up with a calculated number of numHistoryShards setting in Temporal which is immutable? For total 3 workflows: Our Temporal TPS: 30/s Our TPS is low but our waits schedules are high W… --- ## [What is the recommended setup for running Cadence/Temporal with Cassandra on production?](https://community.temporal.io/t/what-is-the-recommended-setup-for-running-cadence-temporal-with-cassandra-on-production/556)
**Author:** [@Akshay\_Goyal](https://community.temporal.io/u/Akshay_Goyal)\ **Replies:** 11\ **Last updated:** [September 18, 2026, 8:18am UTC](https://community.temporal.io/t/what-is-the-recommended-setup-for-running-cadence-temporal-with-cassandra-on-production/556 "2026-09-18T08:18:19Z")
We’ll be running our own Cassandra setup on Kubernetes What is the recommended cluster size replication factor write level read level Any other parameter that I may have missed Rough scale estimates: Current scale: … --- ## [Running on Amazon Keyspaces](https://community.temporal.io/t/running-on-amazon-keyspaces/159)
**Author:** [@Jared\_Sutherland](https://community.temporal.io/u/Jared_Sutherland)\ **Replies:** 19\ **Last updated:** [February 12, 2026, 12:05pm UTC](https://community.temporal.io/t/running-on-amazon-keyspaces/159 "2026-02-12T12:05:31Z")
Curious if anyone has been running Temporal with Amazon Keyspaces vs. managing their own Cassandra cluster? I know there is some specifics around the authentication around DataStax. --- ## [Temporal failure: scheduled event being referred by duplicate task events with exact same timestamp](https://community.temporal.io/t/temporal-failure-scheduled-event-being-referred-by-duplicate-task-events-with-exact-same-timestamp/18703)
**Author:** [@jxwang](https://community.temporal.io/u/jxwang)\ **Replies:** 3\ **Last updated:** [November 28, 2025, 6:32pm UTC](https://community.temporal.io/t/temporal-failure-scheduled-event-being-referred-by-duplicate-task-events-with-exact-same-timestamp/18703 "2025-11-28T18:32:47Z")
Hi Temporal Team, We are facing a severe issue in production, and it looks like a temporal server issue: The eventId 170 which is a scheduled task is already referred by event id 177 (task started) and 178 (task comple… --- ## [ContinueAsNew fails to clean up open\_executions, leading to duplicates](https://community.temporal.io/t/continueasnew-fails-to-clean-up-open-executions-leading-to-duplicates/18709)
**Author:** [@Sergej\_Skubin](https://community.temporal.io/u/Sergej_Skubin)\ **Replies:** 1\ **Last updated:** [November 28, 2025, 10:35am UTC](https://community.temporal.io/t/continueasnew-fails-to-clean-up-open-executions-leading-to-duplicates/18709 "2025-11-28T10:35:58Z")
I had an issue with a Temporal cluster deployed in Kubernetes using a Helm chart, server version 1.22.4. The main and visibility storage is Cassandra. We migrated from one Cassandra database to another using dsbulk; the … --- ## [Cassandra Version Recommendation](https://community.temporal.io/t/cassandra-version-recommendation/18153)
**Author:** [@quinnzon.r.djauhari](https://community.temporal.io/u/quinnzon.r.djauhari)\ **Replies:** 3\ **Last updated:** [August 12, 2025, 5:04am UTC](https://community.temporal.io/t/cassandra-version-recommendation/18153 "2025-08-12T05:04:18Z")
Hi all, We would like to setup a new temporal cluster with apache Cassandra as persistence layer. Would like to know compatibility version of newer Cassandra version as in documentation we only found tested to Cassandra… --- ## [Temporal server down - Cassandra version compatibility check failed no connections were made when creating the session](https://community.temporal.io/t/temporal-server-down-cassandra-version-compatibility-check-failed-no-connections-were-made-when-creating-the-session/6058)
**Author:** [@sahir](https://community.temporal.io/u/sahir)\ **Replies:** 3\ **Last updated:** [July 13, 2025, 5:14pm UTC](https://community.temporal.io/t/temporal-server-down-cassandra-version-compatibility-check-failed-no-connections-were-made-when-creating-the-session/6058 "2025-07-13T17:14:37Z")
Hi Team, We have installed Temporal server in Kubernetes from helm chart. We are using Cassandra. Temporal server is goes down when I get the logs of the pod it shows an error like Cassandra version compatibility check… --- ## [Temporal Is not able to connect to Cassandra even when one node is down](https://community.temporal.io/t/temporal-is-not-able-to-connect-to-cassandra-even-when-one-node-is-down/4444)
**Author:** [@raghudeshu](https://community.temporal.io/u/raghudeshu)\ **Replies:** 2\ **Last updated:** [February 27, 2025, 1:40pm UTC](https://community.temporal.io/t/temporal-is-not-able-to-connect-to-cassandra-even-when-one-node-is-down/4444 "2025-02-27T13:40:15Z")
Hello Guys, We are doing the load test and we observed Temporal is not able to connect to Cassandra even when ONE node is down. Does any faced similar issues? Expectations: Even when one node is down we are expecting t… --- ## [Garbage collection on Temporal Keyspace](https://community.temporal.io/t/garbage-collection-on-temporal-keyspace/16259)
**Author:** [@Kishore\_Gunda](https://community.temporal.io/u/Kishore_Gunda)\ **Replies:** 0\ **Last updated:** [January 28, 2025, 9:13am UTC](https://community.temporal.io/t/garbage-collection-on-temporal-keyspace/16259 "2025-01-28T09:13:46Z")
Hi, We are running temporal with cassandra DB with 3 nodes in one DC. Does Temporal initiate the garbage collection on cassandra at all on temporal keyspace? i have triggered garbage collect on one of the nodes and it … --- ## [High Availability Cross Region Deployment](https://community.temporal.io/t/high-availability-cross-region-deployment/13738)
**Author:** [@alio](https://community.temporal.io/u/alio)\ **Replies:** 0\ **Last updated:** [October 2, 2024, 7:49am UTC](https://community.temporal.io/t/high-availability-cross-region-deployment/13738 "2024-10-02T07:49:35Z")
Hi everyone. Since Temporal is getting more critical within our organization with an increasing volume of usage and dependency, we’re looking for a way to include Temporal deployment in our business continuity implement… --- ## [Workflow run Failure with namespace not found](https://community.temporal.io/t/workflow-run-failure-with-namespace-not-found/2125)
**Author:** [@Pruthvi](https://community.temporal.io/u/Pruthvi)\ **Replies:** 5\ **Last updated:** [August 21, 2024, 5:53pm UTC](https://community.temporal.io/t/workflow-run-failure-with-namespace-not-found/2125 "2024-08-21T17:53:33Z")
Hello I’m using the helm chart installation of temporal on K8s with cassandra. As I use the sample java sdk workflow I cannot run the workflow either with a default namespace or setnamespaace. methods on workflowclientop… --- ## [Schedules return after deleting it in opensearch](https://community.temporal.io/t/schedules-return-after-deleting-it-in-opensearch/12600)
**Author:** [@Rainboom7](https://community.temporal.io/u/Rainboom7)\ **Replies:** 0\ **Last updated:** [June 21, 2024, 1:21pm UTC](https://community.temporal.io/t/schedules-return-after-deleting-it-in-opensearch/12600 "2024-06-21T13:21:54Z")
We have config with cassandra and opensearch for visibility persistence: defaultStore: default additionalStores: {} visibilityStore: opensearch-visibility datastores: opensearch-visi… --- ## [Deploying temporal with helm charts](https://community.temporal.io/t/deploying-temporal-with-helm-charts/10536)
**Author:** [@Akai](https://community.temporal.io/u/Akai)\ **Replies:** 1\ **Last updated:** [April 21, 2024, 9:04pm UTC](https://community.temporal.io/t/deploying-temporal-with-helm-charts/10536 "2024-04-21T21:04:54Z")
Hi, I am trying to install the temporal server and all its dependencies using the helm charts. All the pods are getting deployed successfully, but the cassandra pod is going into crash loop back off. Below is the error… --- ## [Cassandra tombstones from workflow executions](https://community.temporal.io/t/cassandra-tombstones-from-workflow-executions/11321)
**Author:** [@scoplin6](https://community.temporal.io/u/scoplin6)\ **Replies:** 1\ **Last updated:** [March 13, 2024, 4:05pm UTC](https://community.temporal.io/t/cassandra-tombstones-from-workflow-executions/11321 "2024-03-13T16:05:16Z")
Greetings, We are self-hosting Temporal (v1.18.5 – yes… old) and Cassandra (v3.11.13) as our execution database. We have 4096 history shards. We are seeing the following warnings in our database logs: WARN \[ReadStag… --- ## [Cassandra query time-out when deleting workflow executions from deleted namespace](https://community.temporal.io/t/cassandra-query-time-out-when-deleting-workflow-executions-from-deleted-namespace/11265)
**Author:** [@l\_benke\_futureplc](https://community.temporal.io/u/l_benke_futureplc)\ **Replies:** 0\ **Last updated:** [March 6, 2024, 2:38pm UTC](https://community.temporal.io/t/cassandra-query-time-out-when-deleting-workflow-executions-from-deleted-namespace/11265 "2024-03-06T14:38:38Z")
Hi, i’ve deleted a namespace from our self-hosted cluster using temporal CLI. The namespace contained a lot of open executions for which no workers were listening. After deleting the namespace, a new namespace marked a… --- ## [The seed provider lists no seeds Error while using Helm chart Deployment](https://community.temporal.io/t/the-seed-provider-lists-no-seeds-error-while-using-helm-chart-deployment/10555)
**Author:** [@Bangu](https://community.temporal.io/u/Bangu)\ **Replies:** 0\ **Last updated:** [January 3, 2024, 5:25am UTC](https://community.temporal.io/t/the-seed-provider-lists-no-seeds-error-while-using-helm-chart-deployment/10555 "2024-01-03T05:25:57Z")
Hi All We are trying to install the temporal server and all its dependencies using the helm charts. All the pods are getting deployed successfully, but the Cassandra pod is going into crash loop back off its having 3 B… --- ## [Slowness in creating schema using temporal-cassandra-tool](https://community.temporal.io/t/slowness-in-creating-schema-using-temporal-cassandra-tool/5160)
**Author:** [@poojabhutada](https://community.temporal.io/u/poojabhutada)\ **Replies:** 4\ **Last updated:** [December 20, 2023, 10:27am UTC](https://community.temporal.io/t/slowness-in-creating-schema-using-temporal-cassandra-tool/5160 "2023-12-20T10:27:08Z")
Hi, We have observed that creating schema using temporal-cassandra-tool on a cassandra cluster deployed on GKE takes as long as 2-3 hrs. Has anyone faced similar issue? Following below to create schema : Please help. … --- ## [Working with queues](https://community.temporal.io/t/working-with-queues/5205)
**Author:** [@Alexander](https://community.temporal.io/u/Alexander)\ **Replies:** 13\ **Last updated:** [November 29, 2023, 4:30pm UTC](https://community.temporal.io/t/working-with-queues/5205 "2023-11-29T16:30:54Z")
Hi all. We are designing an asynchronous system. In it, incoming requests will be processed by the workflow, by transmitting a signal. All this will happen at a certain speed for the client, which depends on the capacit… --- ## [Context deadline exceeded while initiating workflows](https://community.temporal.io/t/context-deadline-exceeded-while-initiating-workflows/8761)
**Author:** [@Arvind\_Narayanan](https://community.temporal.io/u/Arvind_Narayanan)\ **Replies:** 3\ **Last updated:** [November 29, 2023, 11:37am UTC](https://community.temporal.io/t/context-deadline-exceeded-while-initiating-workflows/8761 "2023-11-29T11:37:20Z")
Hi, so we are currently using temporal in some of our services and occasionally we run into a problem wherein the workflow initiation gives context deadline exceeded. Also once a workflow with a particular wfid gives con… --- ## [Temporal 1.20.3 "unable to initialize cassandra session" with cql-proxy and astraDb at startup on random pods](https://community.temporal.io/t/temporal-1-20-3-unable-to-initialize-cassandra-session-with-cql-proxy-and-astradb-at-startup-on-random-pods/8767)
**Author:** [@marcob](https://community.temporal.io/u/marcob)\ **Replies:** 2\ **Last updated:** [November 12, 2023, 3:29pm UTC](https://community.temporal.io/t/temporal-1-20-3-unable-to-initialize-cassandra-session-with-cql-proxy-and-astradb-at-startup-on-random-pods/8767 "2023-11-12T15:29:00Z")
Hello, I’m using temporal 1.20.3 with cql-proxy as sidecar and astraDb on an EKS cluster (1.23) in multi az. Sometimes, not always, when I start a new pod of any temporal component, it may happen that it starts to cras… --- ## [Operation ListOpenWorkflowExecutions encountered unconfigured table open\_executions](https://community.temporal.io/t/operation-listopenworkflowexecutions-encountered-unconfigured-table-open-executions/4628)
**Author:** [@raghudeshu](https://community.temporal.io/u/raghudeshu)\ **Replies:** 7\ **Last updated:** [November 10, 2023, 1:49am UTC](https://community.temporal.io/t/operation-listopenworkflowexecutions-encountered-unconfigured-table-open-executions/4628 "2023-11-10T01:49:02Z")
Hello Team, I am trying to install temporal and I am getting following errors. I am not sure why open and closed executions tables are not created (Checked in DB and its not created. Did any one faces similar issues? C… --- ## [Activities are frequently timing out with minimal load](https://community.temporal.io/t/activities-are-frequently-timing-out-with-minimal-load/9448)
**Author:** [@rajashekhar](https://community.temporal.io/u/rajashekhar)\ **Replies:** 1\ **Last updated:** [September 19, 2023, 5:09am UTC](https://community.temporal.io/t/activities-are-frequently-timing-out-with-minimal-load/9448 "2023-09-19T05:09:00Z")
Activities are frequently timing out with minimal load where as its running perfectly with more load in another cluster. Activities are taking more time to complete, we see “workflow task timeout” and its getting compl… --- ## [Cassandra replication strategy temporal setup](https://community.temporal.io/t/cassandra-replication-strategy-temporal-setup/9450)
**Author:** [@rajashekhar](https://community.temporal.io/u/rajashekhar)\ **Replies:** 0\ **Last updated:** [September 12, 2023, 3:28pm UTC](https://community.temporal.io/t/cassandra-replication-strategy-temporal-setup/9450 "2023-09-12T15:28:25Z")
what is the recommended Cassandra replication strategy for the temporal when we have one datacenter with 3 replicas --- ## [Cassandra capacity and provision estimates](https://community.temporal.io/t/cassandra-capacity-and-provision-estimates/9252)
**Author:** [@Adi\_V](https://community.temporal.io/u/Adi_V)\ **Replies:** 0\ **Last updated:** [August 20, 2023, 6:11pm UTC](https://community.temporal.io/t/cassandra-capacity-and-provision-estimates/9252 "2023-08-20T18:11:41Z")
Hi All, I am new to Temporal and wanted to understand how to go about estimating the Cassandra capacity provisioning based on the number of workflows and activities. e.g. How do go translating the Temporal workflow esti… --- ## [Workflow Queries Tab - upstream connect error or disconnect/reset before headers. reset reason: overflow](https://community.temporal.io/t/workflow-queries-tab-upstream-connect-error-or-disconnect-reset-before-headers-reset-reason-overflow/8785)
**Author:** [@jaffarsadik](https://community.temporal.io/u/jaffarsadik)\ **Replies:** 1\ **Last updated:** [July 17, 2023, 2:16am UTC](https://community.temporal.io/t/workflow-queries-tab-upstream-connect-error-or-disconnect-reset-before-headers-reset-reason-overflow/8785 "2023-07-17T02:16:28Z")
Hi, Temporal Server: v1.18.3 Temporal UI: 2.8.0 Platform: Kubernetes Which Temporal service will be invoke when I click on Workflow–\> Queries tab for custom search attributes (GetSearchAttribues) ? Is there a li… --- ## [What's the recommend value for cassandra table gc\_grace\_seconds?](https://community.temporal.io/t/whats-the-recommend-value-for-cassandra-table-gc-grace-seconds/8375)
**Author:** [@beta\_alpha](https://community.temporal.io/u/beta_alpha)\ **Replies:** 0\ **Last updated:** [May 29, 2023, 1:46am UTC](https://community.temporal.io/t/whats-the-recommend-value-for-cassandra-table-gc-grace-seconds/8375 "2023-05-29T01:46:10Z")
For batch starting a lot of workflow will write/delete a lot row into tasks table, cause create a lot tombstore causing increase latency of read/write --- ## [Persistence.DataStores\[default\](value).Cassandra.Hosts: zero value, Persistence.DataStores\[visibility\](value).Cassandra.Hosts: zero value](https://community.temporal.io/t/persistence-datastores-default-value-cassandra-hosts-zero-value-persistence-datastores-visibility-value-cassandra-hosts-zero-value/4351)
**Author:** [@ridwan.santoso](https://community.temporal.io/u/ridwan.santoso)\ **Replies:** 2\ **Last updated:** [May 27, 2023, 8:32pm UTC](https://community.temporal.io/t/persistence-datastores-default-value-cassandra-hosts-zero-value-persistence-datastores-visibility-value-cassandra-hosts-zero-value/4351 "2023-05-27T20:32:12Z")
Hi All, Please help, I tried to run the temporal image and got this error, although I use the latest image from temporal (using docker pull temporalio/auto-setup:latest). 2022/04/03 11:46:32 Loading config; env=docker,… --- ## [Cassandra history\_node table keeps growing](https://community.temporal.io/t/cassandra-history-node-table-keeps-growing/8181)
**Author:** [@ravikiran](https://community.temporal.io/u/ravikiran)\ **Replies:** 17\ **Last updated:** [May 22, 2023, 3:57pm UTC](https://community.temporal.io/t/cassandra-history-node-table-keeps-growing/8181 "2023-05-22T15:57:28Z")
hi, Cassandra history\_node table keeps growing. We have set namespace retention of 7 days. We observe this on both server versions 1.9.2 and 1.20.1 Did check this related thread. Since we have configured, Cassandr… --- ## [Cassandra Schema - DBA concerns](https://community.temporal.io/t/cassandra-schema-dba-concerns/8248)
**Author:** [@ravikiran](https://community.temporal.io/u/ravikiran)\ **Replies:** 0\ **Last updated:** [May 15, 2023, 2:31pm UTC](https://community.temporal.io/t/cassandra-schema-dba-concerns/8248 "2023-05-15T14:31:44Z")
hi @maxim , Our Cassandra DBA have raised below concerns on the schemas created. Pls help address them. executions and queue\_metadata table a) Multiple blob type columns b) Multiple collection type columns (maps, li… --- ## [Implement Finite State Machine Transitioning in the workflow](https://community.temporal.io/t/implement-finite-state-machine-transitioning-in-the-workflow/8143)
**Author:** [@aprilc](https://community.temporal.io/u/aprilc)\ **Replies:** 10\ **Last updated:** [May 13, 2023, 4:24pm UTC](https://community.temporal.io/t/implement-finite-state-machine-transitioning-in-the-workflow/8143 "2023-05-13T16:24:01Z")
I’d like to design a Workflow A with a Finite State Machine (FSM) embedded within. This workflow is a long execution process that will be transitioned to multiple different stages based on the state received from inside … [Next page](https://community.temporal.io/tag/cassandra/15.md?match_all_tags=true&page=1&tags%5B%5D=cassandra)