New jlibtorrent

tricolor beagle on snow covered ground during daytime

Download binaries

jlibtorrent changelog

  • openssl 1.1.1j upgrade
  • lt:fix incoming TCP connections when using tracker-only proxy
  • lt:fix issue with paths starting with ./
  • lt:fix integer overflow when setting a high DHT upload rate limit
  • lt:improve Path MTU discovery logic in uTP
  • lt:fix overflow issue when rlimit_nofile is set to infinity
  • lt:Fix cxxflags and linkflags injection via environment variables

JLibtorrent: A swig Java interface for libtorrent by the makers of FrostWire.

Develop libtorrent based apps with the joy of coding in Java.

New frostwire-desktop-6.9.1-301 with jlibtorrent





Any JRE compatible OS:

group of people on top of building


frostwire (6.9.1) stable; urgency=high

  • jlibtorrent- update
  • Detects MozillaVPN
  • Soundcloud search fixed
  • lt:fix loading of DHT node ID from previous session on startup
  • lt:use getrandom(), when available, and fall back to /dev/urandom
  • lt:fix uTP issue acking FIN packets
  • lt:validate HTTPS certificates by default (trackers and web seeds)
  • lt:load SSL certificates from windows system certificate store, to authenticate trackers
  • lt:introduce mitigation for Server Side Request Forgery in tracker and web seed URLs
  • lt:fix error handling for pool allocation failure
  • Windows build reverts to jdk-14 — FrostWire Team Thu, 14 Jan 2020 18:47:00 -0600

jLibtorrent – Develop libtorrent powered apps and services in Java (android, windows, linux, macos binaries)

A swig Java interface for libtorrent by the makers of FrostWire.

Develop libtorrent based apps with the joy of coding in Java.

More information at
Discord Developer Chatroom

jlibtorrent- 408 KB

Java API Jar
jlibtorrent- 684 KB

Shared Native Libraries (.dll, .so, .dylib containing jars)
jlibtorrent-android-arm- 2.36 MB
jlibtorrent-android-arm64- 2.42 MB
jlibtorrent-android-x86- 2.72 MB
jlibtorrent-android-x86_64- 2.7 MB
jlibtorrent-linux- 5.67 MB
jlibtorrent-macosx- 2.22 MB
jlibtorrent-windows- 4.67 MB

 * New TorrentHandle.inSession() [blocking method, do not use in main UI threads]
 * New ability for SessionManager to build a paused session
 * New SessionManager.start(SessionParams, session_flags_t)
 * New SessionHandle.PAUSED (session_flag_t) and corresponding unit tests
 * Removed TorrentStatus::State::ALLOCATING enum
 * Removed torrent_status.state_t.unused_enum_for_backwards_compatibility_allocating
 * libtorrent update (471e772cb7038f1bf5f44c32a09eb42fbb80ee99)
 * lt: upgraded to openssl 1.1.1l
 * lt: fix issue with moving the session object
 * lt: deprecate torrent_status::allocating. This state is no longer used
 * lt: fix bug creating torrents with symbolic links
 * lt: remove special case to save metadata in resume data unconditionally when added throught magnet link
 * lt: fix bugs in mutable-torrent support (reusing identical files from different torrents)
 * lt: fix incorrectly inlined move-assignment of file_storage
 * lt: add session::paused flag, and the ability to construct a session in paused mode
 * lt: fix session-pause causing tracker announces to fail
 * lt: fix peer-exchange flags bug
 * lt: allow saving resume data before metadata has been downloaded (for magnet links)
 * lt: record blocks in the disk queue as downloaded in the resume data
 * lt: fix bug in set_piece_deadline() when set in a zero-priority piece
 * lt: fix issue in URL parser, causing issues with certain tracker URLs
 * lt: use a different error code than host-unreachable, when skipping tracker announces

[SOLUTION] macoS Big Sur possible FrostWire Freeze on Startup

Here are some things that might help with Freezes some users are reporting until we find the root cause, or when Apple finally releases 11.0.2 fixing a lot of irregularities we’ve experienced with this operating system.

For some reason, on some installations of macOS Big Sur FrostWire can freeze when trying to show the “Tip of the Day” window.

To avoid that window from showing on startup, all you have to do is add a setting in the frostwire.props file

Please try the following before you launch the application:

1. Make sure you’re running our latest FrostWire update

2. With the Text Editor app of your choice please edit the file ~/Library/Preferences/FrostWire5/frostwire.props

and add the line

This has helped some people get past a the freeze when the “Tip of The Day” window is shown on macOS Big Sur.

Update: If this doesn’t help you solve the freeze, please know that we’re finding the root cause of the freeze, we’re upgrading all of our third party libraries and trying to debug what could be the root cause of the problem. In the meantime please make sure you have our latest build

[dev] How we got Travis Continuous Integration for multiple language projects in a mono repo

With every commit that makes it to the monorepo both the Android and Desktop project are built and tested. This post documents how we did that.

This post is intended to help developers on other projects where they need wish to start multiple travis jobs for completely different configurations.

Most documented examples on the web on how to use travis are usually focused only on building a single project in a single environment. But what if your repository has multiple projects that need to run under different contexts and programming languages.

At FrostWire we have a big monorepo which is host to multiple projects:

android/ # android client (java8, android-sdk environment gradle build)
desktop/ # desktop client and tests (java11+ gradle build)
common/ # common java sources for android and desktop projects

Travis allows you to define what we understand to be a “Job Matrix”, where each entry in this Matrix specifies an individual job (and they can run in parallel when you push your commit and travis gets word of it)

Here’s our first version of .travis.yml to build the android and desktop projects, and run tests jobs on a single git push:
    # android build job
    - language: android
      dist: xenial
          - build-tools 29.0.2
          - android-29
          - extra-google-google_play_services
          - extra-google-m2repository
          - extra-android-m2repository
        - 'android-sdk-preview-license-52d11cd2'
        - 'android-sdk-license-.+'
        - 'google-gdk-license-.+'
        - yes | $ANDROID_HOME/tools/bin/sdkmanager "build-tools;29.0.2"
        - cd android
        - pwd
        - ./gradlew assembleDebug
    # desktop build job
    - language: java
        - openjdk11
        - cd desktop
        - gradle build
    # desktop/common tests job
    - language: java
        - openjdk11
        - cd desktop
        - gradle test

New FrostWire 6.8.6 for Windows, macOS and Linux

Download the new release with the faster torrent downloads and improved search

Windows 64-bit: MB

macOS 64-bit:
frostwire-6.8.6.dmg45.7 MB

Ubuntu/Debian 64-bit
frostwire-6.8.6.amd64.deb13.5 MB

Red Hat/RPM-based
frostwire-6.8.6.amd64.rpm14.9 MB

Java 11+ for any other OS
frostwire-6.8.6.amd64.tar.gz1 4.2 MB

Source code(zip)
Source code(tar.gz)

frostwire (6.8.6) stable; urgency=high

  • New jlibtorrent update
  • New 1337x search (thanks to @HimanshuSharma789)
  • New iDope search (thanks to @HimanshuSharma789)
  • Fixed Torrentz2 search dates (thanks to @HimanshuSharma789)
  • Fixed Sound Cloud search
  • Discontinues mplayer video playback, uses os default video player for videos
  • -> 1.4
  • com.squareup.okhttp3:okhttp:4.4.1 -> 4.8.1
  • com.h2database:h2:1.4.199 -> 200
  • lt: validate UTF-8 encoding of client version strings from peers
  • lt: don’t time out tracker announces as eagerly while resolving hostnames
  • lt: fix NAT-PMP shutdown issue
  • lt: improve hostname lookup by merging identical lookups
  • lt: fix network route enumeration for large routing tables
  • lt: fixed issue where pop_alerts() could return old, invalid alerts
  • lt: fix issue when receiving have-all message before the metadata
  • lt: don’t leave lingering part files handles open
  • lt: disallow calling add_piece() during checking
  • lt: fix incorrect filename truncation at multi-byte character
  • lt: always announce listen port 1 when using a proxy

— FrostWire Team Sun, 23 Aug 2020 10:45:00 -0600

Upgrading to FrostWire 6.8.5 on Ubuntu (troubleshooting possible OpenJDK14 dependency issues)

Download frostwire-6.8.5.amd64.deb

As of FrostWire 6.8.5 we’re moving all of our builds to run on OpenJDK14.

They linux build will still run fine with OpenJDK11 on your ${PATH} but we highly
recommend you have OpenJDK14 to help you sort out any weird behavior and reduce
JRE fragmentation on the network.

If you don’t have openjdk-14-jre installed when you install the FrostWire 6.8.5 .deb file you will get an error like the following:

Unpacking frostwire (6.8.5) ...
dpkg: dependency problems prevent configuration of frostwire:
frostwire depends on openjdk-14-jre-headless; however:
Package openjdk-14-jre-headless is not installed.

In order to solve just issue the command:

sudo apt -f install

It will try to pickup on the last failed install and download all the missing dependencies for you.

$ sudo apt -f install
Reading package lists... Done
Building dependency tree
Reading state information... Done
Correcting dependencies... Done
The following additional packages will be installed:
Suggested packages:
fonts-ipafont-gothic fonts-ipafont-mincho fonts-wqy-microhei | fonts-wqy-zenhei
The following NEW packages will be installed:
0 upgraded, 1 newly installed, 0 to remove and 5 not upgraded.
1 not fully installed or removed.
Need to get 43.2 MB of archives.
After this operation, 190 MB of additional disk space will be used.
Do you want to continue? [Y/n] Y
Get:1 eoan/universe amd64 openjdk-14-jre-headless amd64 14~18-1 [43.2 MB]
Fetched 43.2 MB in 9s (4,920 kB/s)
Selecting previously unselected package openjdk-14-jre-headless:amd64.
(Reading database ... 377184 files and directories currently installed.)
Preparing to unpack .../openjdk-14-jre-headless_14~18-1_amd64.deb ...
Unpacking openjdk-14-jre-headless:amd64 (14~18-1) ...
Setting up openjdk-14-jre-headless:amd64 (14~18-1) ...
update-alternatives: using /usr/lib/jvm/java-14-openjdk-amd64/bin/jfr to provide /usr/bin/jfr (jfr) in auto mode
update-binfmts: warning: current package is openjdk-11, but binary format already installed by openjdk-6
Setting up frostwire (6.8.5) ...

If this doesn’t work out, that only means your apt sources can’t find the OpenJDK-14 ubuntu packages.
We recommend that you update your ubuntu to the latest version, by the time we wrote this post we were running ubuntu eoan.

If you can’t or won’t upgrade to ubuntu eoan, you can always add the package repo and install the openjdk manually

sudo add-apt-repository ppa:openjdk-r/ppa
sudo apt update
sudo apt install openjdk-14-jre-headless

Why is the new .deb almost twice as large as the previous versions.

In the past, OpenJDK would include a tool called “pack200” which would allow us to greatly compress our Java .class files prior to packing everything in the .deb/.tar.gz or .rpm files

Oracle removed the pack200 tools from the OpenJDK starting at version 14.

Perhaps there were some impossible tradeoffs they made when compiling and pack200 was no longer a viable tool.

New FrostWire 6.8.5 for Desktop with libtorrent/ and OpenJDK 14

Free Download installer links, with no bundled offers

macOS frostwire-6.8.5.dmg
Linux Ubuntu/Debian frostwire-6.8.5.amd64.deb
Linux RPM frostwire-6.8.5.amd64.rpm
Source code (.zip)
Source code (.tar.gz)

This is big release with the fastest downloads we’ve ever experienced on our desktop client.

We’ve done maintenance to all of our search providers and added a new one (MagnetDL).
Now when downloads fail to start you have a new action to “Retry Transfer”

We’ve gone from libtorrent/1.2.3 all the way to the latest 1.2.7 version giving you hundreds of performance updates and bug fixes that end up bringing the fastest downloads of any FrostWire release we’ve done.

On top of that, this new FrostWire is running on the latest stable Java Runtime, the OpenJDK 14.

Here is the full changelog.

frostwire (6.8.5) changelog

  • New MagnetDL search provider
  • Fixed Torrentz2 search
  • Search improvements
  • New ‘Retry’ transfer for failed magnet/torrent downloads with not enough peers
  • Fixes bug getting source URL from TPB search result
  • Fixes broken Library local file search
  • updated: rej2:1.3, gson:2.8.6, okhttp:4.4.1
  • New jlibtorrent update
  • jlibtorrent upgraded to build with boost 1.73.0
  • jlibtorrent upgraded to openssl 1.1.1g
  • OpenJDK 14 runtime (Windows, Linux, macOS)
  • lt: fix incorrect filename truncation at multi-byte character
  • lt: always announce listen port 1 when using a proxy
  • lt: add set_alert_fd in python binding, to supersede set_alert_notify
  • lt: fix bug in part files > 2 GiB
  • lt: add function to clear the peer list for a torrent
  • lt: fix resume data functions to save/restore more torrent flags
  • lt: limit number of concurrent HTTP announces
  • lt: fix queue position for force_rechecking a torrent that is not auto-managed
  • lt: improve rate-based choker documentation, and minor tweak
  • lt: undeprecate upnp_ignore_nonrouters (but refering to devices on our subnet)
  • lt: increase default tracker timeout
  • lt: retry failed socks5 server connections
  • lt: allow UPnP lease duration to be changed after device discovery
  • lt: fix IPv6 address change detection on Windows
  • lt: fix peer timeout logic
  • lt: simplify proxy handling. A proxy now overrides listen_interfaces
  • lt: fix issues when configured to use a non-default choking algorithm
  • lt: fix issue in reading resume data
  • lt: revert NXDOMAIN change from 1.2.4
  • lt: don’t open any listen sockets if listen_interfaces is empty or misconfigured
  • lt: fix bug in auto disk cache size logic
  • lt: fix issue with outgoing_interfaces setting, where bind() would be called twice
  • lt: add build option to disable share-mode
  • lt: support validation of HTTPS trackers
  • lt: deprecate strict super seeding mode
  • lt: make UPnP port-mapping lease duration configurable
  • lt: deprecate the bittyrant choking algorithm
  • lt: add build option to disable streaming

— FrostWire Team Fri, 19 Jun 2020 19:55:00 -0600

Running FrostWire with OpenJDK-Jre-13 binaries

Some of our friends not running FrostWire on Ubuntu have had LOTS of issues getting the old OpenJDK 11 JRE to install with their package managers, won’t name on what Linux distribution.

When your package managers fail, you can either compile the source, or if you can get a binary distribution from a reputable signed source you can add it to your PATH and FrostWire will use the `java` binary that’s on the linux PATH.

Here’s an email we wrote to one of our most patient Linux users, Cheers Donald!

1. go to your home folder
$ cd
2. If you don’t have a “src” folder in your home, let’s create one in your home folder. I use a “src” folder for everything that I compile or download this way already compiled that’s outside the apt realm
$ mkdir src

3. Download the JDK 13 SDK (187MB), much better,faster than the 11. (the -4 switch is to use IPv4, I had issues downloading via IPv6), there’s already JDK 14, but I won’t test it until we do the next build since the unpack tool has been removed and the installer won’t work with JDK14 *sigh*.
~/src$ wget -4
Saving to: ‘openjdk-13+33_linux-x64_bin.tar.gz’
openjdk-13+33_linux-x64_bin.ta 100%[====================================================>] 187.27M  3.90MB/s    in 50s     
2020-04-15 22:20:30 (3.72 MB/s) - ‘openjdk-13+33_linux-x64_bin.tar.gz’ saved [196363513/196363513]
4. Untar and unzip the .tar.gz file
~/src$ tar xvfz openjdk-13+33_linux-x64_bin.tar.gz


5. Make sure java 13 runs
~/src$ ./jdk-13/bin/java --version
openjdk 13 2019-09-17
OpenJDK Runtime Environment (build 13+33)
OpenJDK 64-Bit Server VM (build 13+33, mixed mode, sharing)
6. Let’s fix your ${JAVA_HOME} env variable on your .bashrc to be now, PATH should stay the same, the beauty of JAVA_HOME variable. We don’t add the ‘/bin’ at the end because we can use JAVA_HOME/lib and other folders for other things when we’re coding.
export JAVA_HOME=${HOME}/src/jdk-13

export PATH=${JAVA_HOME}/bin:${PATH}
7. You can reload the variables of your terminal by executing the .bashrc file (or opening a new terminal window)
$ source ~/.bashrc
8. Now if you run `java –version` you should see openjdk 13. Notice how my PATH has the old Java 11, but the new one at the start is parsed first
$ echo ${PATH}

$ java --version

openjdk version "13" 2019-09-17
OpenJDK Runtime Environment (build 13+33)
OpenJDK 64-Bit Server VM (build 13+33, mixed mode, sharing)
9. Install the latest frostwire 6.8.4 (if you don’t have it get it from here) with
$ sudo dpkg -i frostwire-6.8.4.amd64.deb

Selecting previously unselected package frostwire.
(Reading database ... 381934 files and directories currently installed.)
Preparing to unpack frostwire-6.8.4.amd64.deb ...
Unpacking frostwire (6.8.4) ...
Setting up frostwire (6.8.4) ...
Unpacking libraries...
Unpacking frostwire.pack
Warning: The unpack200 tool is deprecated, and is planned for removal in a future JDK release.
Unpacking gettext-ant-tasks-0.9.7.pack
Warning: The unpack200 tool is deprecated, and is planned for removal in a future JDK release.
Unpacking jlibtorrent-
Warning: The unpack200 tool is deprecated, and is planned for removal in a future JDK release.
Done unpacking
Processing triggers for desktop-file-utils (0.23-1ubuntu3.18.04.2) ...
Processing triggers for mime-support (3.60ubuntu1) ...
Processing triggers for bamfdaemon (0.5.3+18.04.20180207.2-0ubuntu1) ...
Rebuilding /usr/share/applications/bamf-2.index...
Processing triggers for hicolor-icon-theme (0.17-2) ...
Processing triggers for man-db (2.8.3-2ubuntu0.1) ...
10. Run FrostWire
$ frostwire
HOSTNAME IS gubatron-VirtualBox
Starting FrostWire...
Java exec found in PATH. Verifying...
Suitable java version found [java = 13]
Configuring environment...
Loading FrostWire:"Linux"
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.frostwire.gui.theme.ThemeMediator (file:/usr/lib/frostwire/frostwire.jar) to method java.awt.Toolkit.setDesktopProperty(java.lang.String,java.lang.Object)
WARNING: Please consider reporting this to the maintainers of com.frostwire.gui.theme.ThemeMediator
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
FrostWire version 6.8.4 build 292
OpenJDK 64-Bit Server VM Oracle Corporation 13 Oracle Corporation
Peer Fingerprint: -FW6842-
User Agent: FrostWire/6.8.4 libtorrent/
Apr 16, 2020 1:38:49 PM BTEngine 
INFO: Listen succeeded on endpoint: type:TCP
Screen Shot 2020-04-16 at 1.39.00 PM