Universal Media Server

What's new in this version:

New:
- Full support for virtual threads with a virtual thread async tracking type (new in Java 21)
- Added a garbage collector probe
- Added a JFR event browser when opening JFR snapshots
- Opening very large JFR snapshots is now much faster
- JFR snapshots also show the GC probe
- Added support for JFR recording, also on remote machines, local or remote Docker container or on Kubernetes
- Added a gRPC probe and a gRPC remote request tracking type
- Near-zero overhead for full sampling when profiling Java 17+
- Probe events view: The type filter drop-down now allows the selection of multiple types
- Probe events view: When multiple events are selected, the cumulated call tree, CPU hot spots or probe hot spots are shown below the events table
- Probe events and control objects views: Scales for duration and throughput columns are now configurable in the view settings dialog.
- Probe events, control objects, current monitors and monitor history views: Multi-column filters with range editors for numeric values
- Probe events view: Histograms for event durations and recorded throughputs are shown at the bottom. Events can be filtered by selecting an interval in the histograms.
- Probe telemetries view: After selecting a time interval with the mouse, the events view will be shown with a corresponding time filter. This also works for probe telemetries that have been added to the VM telemetries.
- Probe call tree and hot spots view: Added a "Show events" action that will set a corresponding call stack or hot spots filter and show the probe events view
- The "Show events" action and the "Show in heap walker" actions in the control objects views of probes now support multiple selection of control objects
- In the telemetry overviews for VM telemetries and probe telemetries, the telemetries can be reordered via drag and drop
- VM telemetries that are based on recorded objects are now always shown, with actions to start recording and to show the recorded object views
- Selected probe telemetries can be added to the VM telemetry section with actions to start recording and to show the corresponding probe view
- Telemetries can be exported as SVG, the PNG export is still optionally available
- Current monitor data is now a snapshot rather than continuously updated. A corresponding trigger action and controller API method are available.
- Current monitors and locking graph views now show java.util.concurrent locks
- Current monitors and locking graph views now group similar threads. This makes it easier to interpret locking situations with many threads and is important for supporting virtual threads.
- Current monitors and locking graph are now also available in attach mode, for java.util.concurrent locks only
- Thread history and probe time line views: Threads can be reordered via drag and drop
- Thread history and probe time line views: Threads can be sorted by start time or alphabetically
- Flame graphs can be exported as SVG
- The tooltip in flame graphs is now pinnable, so hovering over the tree can be free of any obstructions from the tool tip
- Flame graph colorizations are now persisted
- "Show Source" and "Show Bytecode" context menu actions have been added to the flame graph
- In the attach dialog reduced the number of "unknown" processes, showing the Java home directory instead
- Support for attaching to Linux processes that were started by systemd with PrivateTmp=yes
- Support for attaching to Linux processes with namespaced mounts that make /var/tmp non-writable
- Support for profiling Java 21
- Added a "Modify classpath action" to script dialogs
- Telemetries that show rates, such as recorded throughputs, are now shown as histograms
- Reorganized probes into new categories: "Databases", "HTTP, RPC & JEE" and "JVM & Custom Probes"
- JProfiler now optionally offers to save a snapshot first when detaching from or stopping a profiled JVM
- Added support for profiling on Linux Alpine ARM
- Show the number of rows in the "total" line of monitor views
- Added a "Duplicate recording profile" action in the recording profiles dialog
- Locking history graph: Added a "Select between bookmarks" action

Fixed:
- Monitor history and locking history graph view: On Java 14+, some java.util.concurrent monitor objects were not shown for "waiting" entries.
- Expanding multiple levels in the probe hot spots views did not work
- View dialogs were sometimes centered on the wrong window
- The filter history for some trees was not persistent
- Call tree flame graphs: The "Set as root" action was not available on the bottom row