The JGroups wiki page.

The JGroups home page

The latest JGroups API

The documentation for JGroups 3.x is at http://www.jgroups.org/manual-3.x/html/index.html.

Support and supported versions

• Support for JGroups

The JChannel

• JChannel structure and life cycle

• A JGroups Protocol

Protocols

• Protocol Configuration Common Parameters

• Transport Protocols

  • TP

  • UDP

  • TCP

  • TCP_NIO

• TUNNEL

• Discovery Protocols

  • PING

  • TCPPING

  • TCPGOSSIP

  • MPING

  • S3_PING

  • JDBC_PING

• Merging Protocols

  • MERGE2

• Failure Detection Protocols

  • FD

  • FD_SOCK

  • VERIFY_SUSPECT

• Reliable Message Transmission Protocols

  • pbcast.NAKACK

  • pbcast.STABLE

  • UNICAST

• Fragmentation Protocols

  • FRAG

  • FRAG2

• Group Membership Protocols

  • pbcast.GMS

  • VIEW_SYNC

• Flow Control Protocols

  • FC

• State Transfer Protocols

  • pbcast.STATE_TRANSFER

  • pbcast.STREAMING_STATE_TRANSFER

• Virtual synchrony

  • pbcast.FLUSH

• Authentication and Encryption Protocols

  • AUTH

  • ENCRYPT

• Synchronization Protocols

  • BARRIER

Protocol Stack Examples

• TCP-based Protocol Stack

Configuration

• System property handling and IPv4 versus IPv6

• System properties

• Branches and tags

Building Blocks

• MethodCall

Performance

• Running the performance tests

• Performance tuning

Security

• Authentication

• Encryption

• PKI

• PerformanceImplications

Misc

• Differences between 2.x and 3.x

• Supported JDKs

• What version of JGroups ships with JBossAS?

• I want two isolated clusters on the same network

• UDP bundling, fragmentation and MTU

• Message bundling and cluster RPCs

• RPCs and view changes

• Sending of messages in viewAccepted() callback

• IP Bonding

• FD versus FD_SOCK

• Shunning

• Last message dropped problem in NAKACK

• JMX Support

• Using random ports in TCP

• Gossip Router FAQ

• JGroups ME (Micro Edition)

• Using JGroups from mavenized builds

• Migration from multiplexer to shared transport

• TCP and UNICAST

• Large clusters

• Problem with packet sizes on EC2

   

   

Troubleshooting

• If you have trouble running replication, you will need to first make sure the nodes are seeing each other. To troubleshoot this, check out Testing Cluster Formation with JGroups and JGroups Installation and Configuration

• Microsoft Windows

• Solaris

• Node's address appears multiple times in same cluster

• Groups on different multicast addresses but same ports receive each others traffic

• Multicasting with IPv4 / IPv6 and cross talking (promiscuous traffic)

• IPv6 problems

• Loopback adaptor on Windows

• FirewallOnLinux

• Testing JBoss with JGroups only

• Pinging the nodes of a cluster

• Logging

• Failure to join a group (handleJoin() problem)

• Probe

  UDP fragmentation problem on Mac OS X

  Multicast routing on Mac OS X

• Debugging JGroups connectivity problems with Wireshark

• Wireshark plugin for JGroups

• Debugging state transfer related issues

• IP multicasts are dropped (IGMP Snooping issues)

JGroups QA

• QA Roadmap

• Simulator

• Quality Risks for AS5

To be relocated

• Deadlock resolution for synchronous reliable group RPC

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