You use the
jinfo command to generate Java configuration information for a specified Java process. This command is experimental and unsupported. For core files use
This command is experimental and unsupported.
jinfo [option] pid
This represents the
jinfocommand-line options. See Options for the jinfo Command.
The process ID for which the configuration information is to be printed. The process must be a Java process. To get a list of Java processes running on a machine, use either the
pscommand or, if the JVM processes are not running in a separate docker instance, the jps command.
Note:JDK 10 added support for using the Attach API when attaching to Java processes running in a separate docker process. However, the
jpscommand will not list the JVM processes that are running in a separate docker instance. If you are trying to connect a Linux host with a Virtual Machine that is in a docker container, you must use tools such as
psto look up the PID of the JVM.
jinfo command prints Java configuration information for a specified Java process. The configuration information includes Java system properties and JVM command-line flags. If the specified process is running on a 64-bit JVM, then you might need to specify the
-J-d64 option, for example:
jinfo -J-d64 -sysprops pid
This command is unsupported and might not be available in future releases of the JDK. In Windows Systems where
dbgeng.dll is not present, the Debugging Tools for Windows must be installed to have these tools work. The
PATH environment variable should contain the location of the
jvm.dll that’s used by the target process or the location from which the core dump file was produced.
Options for the jinfo Command
If none of the following options are used, both the command-line flags and the system property name-value pairs are printed.
Prints the name and value of the specified command-line flag.
Enables or disables the specified Boolean command-line flag.
Sets the specified command-line flag to the specified value.
Prints command-line flags passed to the JVM.
Prints Java system properties as name-value pairs.
Prints a help message.