Andesite has plugins to support jattach for debugging. Prebuilt jars for them can be found on the releases page.
All responses follow the format
{
"exitCode": 123,
"stderr": "",
"stdout": ""
}Returns agent properties
Prints heap and thread summary to the JVM's stdout. Returns no response to the client. Only included to cover all jattach commands.
Returns a file from the local machine. Useful to download heap dumps.
Query params:
| key | type | description |
|---|---|---|
| path | string | path of the wanted file |
Dumps the JVM heap to the specified path.
Query params:
| key | type | description |
|---|---|---|
| path | string | path to write the heap dump to |
Returns a list of all live objects, including the number of instances, bytes used and class name, grouped by class.
Runs a jcmd command. Use help or help --all for a list of valid commands.
Query params:
| key | type | description |
|---|---|---|
| command | string | command to execute |
Loads an agent library.
Query params:
| key | type | description |
|---|---|---|
| path | string | path to the library |
| absolute | boolean | whether or not the provided path is absolute, defaults to false |
| options | string | options to pass to the agent. May be absent |
Returns the value of a JVM flag.
Query params:
| key | type | description |
|---|---|---|
| flag | string | flag to read |
Returns the JVM system properties present.
Updates a flag. Not all flags may be updated. A list of flags that can be updated can be obtained with
curl http://your-andesite-instance/debug/jcmd?command=VM.flags%20-all | jj stdout | grep manageable
Query params:
| key | type | description |
|---|---|---|
| flag | string | flag to update |
| value | string | value to set |
Returns a thread dump of the VM