List/Grid Tag Archives: Concurrency

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Java Deadlock Example – How to analyze deadlock situation

Deadlock is a programming situation where two or more threads are blocked forever, this situation arises with at least two threads and two or more resources. Here I have written a simple ...
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Waiting for the right moment – in integration testing

When you have to test multi-threaded programs, there is always the need to wait until the system arrives at a particular state, at which point the test can verify that the proper state ...
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Can synchronization be optimised away?

Overview There is a common misconception that because the JIT is smart and synchronization can be eliminated for an object which is only local to a method that there is no performance ...
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Devoxx 2012: Java 8 Lambda and Parallelism, Part 1

Overview Devoxx, the biggest vendor-independent Java conference in the world, took place in Atwerp, Belgium on 12 – 16 November. This year it was bigger yet, reaching 3400 attendees ...
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Parallelization of a simple use case explained

Some time ago a friend of mine asked me about the possibilities of speeding up the following process: they are generating some data in two stages, reading from a database and processing ...
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Investigating Deadlocks – Part 5: Using Explicit Locking

In my last blog I looked at fixing my broken, deadlocking balance transfer sample code using both Java’s traditional synchronized keyword and lock ordering. There is, however, an ...
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Investigating Deadlocks – Part 4: Fixing the Code

In the last in this short series of blogs in which I’ve been talking about analysing deadlocks, I’m going to fix my BadTransferOperation code. If you’ve seen the other blogs ...
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Investigating Deadlocks – Part 3

In my previous two blogs in this series, part 1 and part 2, I’ve demonstrated how to create a piece of bad code that deadlocks and then used this code to show three ways of taking ...
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Java deadlock troubleshooting and resolution

One of the great things about JavaOne annual conferences is the presentation of several technical and troubleshooting labs presented by subject matter experts. One of these labs did ...
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Investigating Deadlocks – Part 2

One of the most important requirements when investigating deadlocks is actually having a deadlock to investigate. In my last blog I wrote some code called DeadlockDemo that used a ...
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