How Do I Configure and Clear the Cache for a Maven Build?

Configuring Build Cache

By default, the option to use cache is enabled when you create a build task. You can specify whether to use the cache when configuring the Build with Maven action.

Clearing Cache

Under extreme conditions such as network jitter or concurrent builds, abnormal cache may occur, leading to build errors. In the following section, you will find the steps to clear the abnormal cache.

Before clearing cache, be well aware of the following caveats:

• Since the cache directory is shared among multiple users in the same tenant, frequent clearing of the cache may cause exceptions (usually a message indicating that "xxx file does not exist") for other users during their builds. Therefore, clear the cache only when it is abnormal. Once the task is successful, remove the cache clearing command. While clearing the cache, avoid running other build tasks that use this cache.
• An accurate file path is required for clearing the cache. For example, to clear the demo 1.0.0 of vendor XXX, run the rm -rf /path/com/xxx/demo/1.0.0 command. If the level of the directory entered in the cache clearing command is too high, the next build will be slow or the dependency will be abnormal due to network problems.
• For security purposes, the cache clearing command can only be run in the Build with Maven action. Running this command in other actions may encounter an error (for example, the clearing operation failed or the directory not found).

1. Click in the Operation column of the build task.
2. Choose Build Actions > Build with Maven. Locate the line starting with mvn xxxx in the commands.
3. Enter the cache clearing command in front of mvn xxx and click Save.

   The cache clearing command follows this format: rm -rf /repository/local/maven/{groupId}/{artifactId}/{version}. Enter the parameters for groupId, artifactId, and version based on the dependency coordinates. The periods in groupId are automatically converted into directory separators (/) and form a directory structure.

   For example, assume that the dependency coordinates are as follows:

   <dependency>
   <groupId>com.xxx.xxx</groupId>
   <artifactId>demo</artifactId>
   <version>1.0.9-SNAPSHOT</version>
   </dependency>

   The command for clearing the dependency is rm -rf /repository/local/maven/com/xxx/xxx/demo/1.0.9-SNAPSHOT.

   

4. Run the build task again. After the task succeeds, edit the task again and remove the cache clearing command.