> For the complete documentation index, see [llms.txt](https://docs.opshub.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.opshub.com/v7.226/help-center-index/troubleshooting-index/errors-index/installer-error-solutions/could-not-self-attach-to-current-vm-using-external-process.md).

# Could not self-attach to current VM using external process

### Description

When OIM is installed on Linux and the OS has NFS (Network File System) based file system, the server start-up might fail.\
Following error occurs:

```
SEVERE [main] org.apache.catalina.core.StandardContext.listenerStart Exception sending context initialized event to listener instance of class [com.opshub.JSON.QuartzIntializationServlet]
 java.lang.IllegalStateException: Could not self-attach to current VM using external process
	at net.bytebuddy.agent.ByteBuddyAgent.installExternal(ByteBuddyAgent.java:459)
	at net.bytebuddy.agent.ByteBuddyAgent.install(ByteBuddyAgent.java:393)
	at net.bytebuddy.agent.ByteBuddyAgent.install(ByteBuddyAgent.java:374)
	at net.bytebuddy.agent.ByteBuddyAgent.install(ByteBuddyAgent.java:342)
	at net.bytebuddy.agent.ByteBuddyAgent.install(ByteBuddyAgent.java:328)
	at com.opshub.eai.core.adapters.common.interceptor.OIMCommonMethodInterceptor.init(OIMCommonMethodInterceptor.java:72)
	at com.opshub.JSON.QuartzIntializationServlet.contextInitialized(QuartzIntializationServlet.java:194)
```

### Cause

* ByteBuddy will try to attach agent to JVM using following socket:
  * `/proc/<processId>/root/tmp/.java_pid<processId>`
* But in case of NFS-based file system, this socket file would not be created.
  * Hence, ByteBuddy fails to attach the agent and server start-up will fail.

### Solution

* Add following line at the end in OIM user's `.bashrc` file (`/home/{OIM user}/.bashrc`):
  * ```bash
    export JAVA_OPTS="$JAVA_OPTS -XX:+StartAttachListener"
    ```
* It will make Java eager load the socket file creation.
* Hence, the socket file will be available to ByteBuddy as soon as it attaches the agent.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.opshub.com/v7.226/help-center-index/troubleshooting-index/errors-index/installer-error-solutions/could-not-self-attach-to-current-vm-using-external-process.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.