| Master Branch: |
| [](https://github.com/apache/storm/actions/workflows/maven.yaml) |
| [](https://search.maven.org/#search|gav|1|g:"org.apache.storm"%20AND%20a:"storm-core") |
| |
| Storm is a distributed realtime computation system. Similar to how Hadoop provides a set of general primitives for doing batch processing, Storm provides a set of general primitives for doing realtime computation. Storm is simple, can be used with any programming language, [is used by many companies](https://storm.apache.org/Powered-By.html), and is a lot of fun to use! |
| |
| The [Rationale page](https://storm.apache.org/documentation/Rationale.html) explains what Storm is and why it was built. [This presentation](https://vimeo.com/40972420) is also a good introduction to the project. |
| |
| Storm has a website at [storm.apache.org](https://storm.apache.org). |
| |
| ## Documentation |
| |
| Documentation and tutorials can be found on the [Storm website](https://storm.apache.org/documentation/Home.html). |
| |
| Developers and contributors should also take a look at our [Developer documentation](DEVELOPER.md). |
| |
| |
| ## Getting help |
| |
| ### Storm Users |
| Storm users should send messages and subscribe to [user@storm.apache.org](mailto:user@storm.apache.org). |
| |
| You can subscribe to this list by sending an email to [user-subscribe@storm.apache.org](mailto:user-subscribe@storm.apache.org). Likewise, you can cancel a subscription by sending an email to [user-unsubscribe@storm.apache.org](mailto:user-unsubscribe@storm.apache.org). |
| |
| You can also [browse the archives of the storm-user mailing list](https://mail-archives.apache.org/mod_mbox/storm-user/). |
| |
| ### Storm Developers |
| Storm developers should send messages and subscribe to [dev@storm.apache.org](mailto:dev@storm.apache.org). |
| |
| You can subscribe to this list by sending an email to [dev-subscribe@storm.apache.org](mailto:dev-subscribe@storm.apache.org). Likewise, you can cancel a subscription by sending an email to [dev-unsubscribe@storm.apache.org](mailto:dev-unsubscribe@storm.apache.org). |
| |
| You can also [browse the archives of the storm-dev mailing list](https://mail-archives.apache.org/mod_mbox/storm-dev/). |
| |
| Storm developers who would want to track the JIRA issues should subscribe to [issues@storm.apache.org](mailto:issues@storm.apache.org). |
| |
| You can subscribe to this list by sending an email to [issues-subscribe@storm.apache.org](mailto:issues-subscribe@storm.apache.org). Likewise, you can cancel a subscription by sending an email to [issues-unsubscribe@storm.apache.org](mailto:issues-unsubscribe@storm.apache.org). |
| |
| You can view the archives of the mailing list [here](https://mail-archives.apache.org/mod_mbox/storm-issues/). |
| |
| ### Issue tracker |
| In case you want to raise a bug/feature or propose an idea, please use [Apache Jira](https://issues.apache.org/jira/projects/STORM). |
| If you do not have an account, you need to create one. |
| |
| ### Which list should I send/subscribe to? |
| If you are using a pre-built binary distribution of Storm, then you should send questions, comments, storm-related announcements, etc. to [user@storm.apache.org](mailto:user@storm.apache.org). |
| |
| If you are building storm from source, developing new features, or otherwise hacking storm source code, then [dev@storm.apache.org](mailto:dev@storm.apache.org) is more appropriate. |
| |
| If you are committers and/or PMCs, or contributors looking for following up and participating development of Storm, then you would want to also subscribe [issues@storm.apache.org](issues@storm.apache.org) in addition to [dev@storm.apache.org](dev@storm.apache.org). |
| |
| ### What happened with storm-user@googlegroups.com? |
| All existing messages will remain archived there, and can be accessed/searched [here](https://groups.google.com/forum/#!forum/storm-user). |
| |
| ## License |
| |
| Licensed to the Apache Software Foundation (ASF) under one |
| or more contributor license agreements. See the NOTICE file |
| distributed with this work for additional information |
| regarding copyright ownership. The ASF licenses this file |
| to you under the Apache License, Version 2.0 (the |
| "License"); you may not use this file except in compliance |
| with the License. You may obtain a copy of the License at |
| |
| https://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, |
| software distributed under the License is distributed on an |
| "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| KIND, either express or implied. See the License for the |
| specific language governing permissions and limitations |
| under the License. |
| |
| The LICENSE and NOTICE files cover the source distributions. The LICENSE-binary and NOTICE-binary files cover the binary distributions. The DEPENDENCY-LICENSES file lists the licenses of all dependencies of Storm, including those not packaged in the source or binary distributions, such as dependencies of optional connector modules. |
| |
| ## Acknowledgements |
| |
| YourKit is kindly supporting open source projects with its full-featured Java Profiler. YourKit, LLC is the creator of innovative and intelligent tools for profiling Java and .NET applications. Take a look at YourKit's leading software products: [YourKit Java Profiler](https://www.yourkit.com/java/profiler/index.jsp) and [YourKit .NET Profiler](https://www.yourkit.com/.net/profiler/index.jsp). |
