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Thread Bugs War Stories Dr Heinz M. Kabutz [email protected]

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Page 1: Thread Bugs War Stories - javaspecialists.eu › talks › pdfs › 2014... · Heinz Kabutz l Author of The Java Specialists' Newsletter – Articles about advanced core Java programming

Thread BugsWar Stories

Dr Heinz M. [email protected]

mailto:[email protected]

Page 2: Thread Bugs War Stories - javaspecialists.eu › talks › pdfs › 2014... · Heinz Kabutz l Author of The Java Specialists' Newsletter – Articles about advanced core Java programming

Heinz Kabutzl Author of The Java Specialists' Newsletter

– Articles about advanced core Java programming

l http://www.javaspecialists.eu

Page 3: Thread Bugs War Stories - javaspecialists.eu › talks › pdfs › 2014... · Heinz Kabutz l Author of The Java Specialists' Newsletter – Articles about advanced core Java programming

What Is A Bug?

Page 4: Thread Bugs War Stories - javaspecialists.eu › talks › pdfs › 2014... · Heinz Kabutz l Author of The Java Specialists' Newsletter – Articles about advanced core Java programming

And What Is A Threading Bug?

Page 5: Thread Bugs War Stories - javaspecialists.eu › talks › pdfs › 2014... · Heinz Kabutz l Author of The Java Specialists' Newsletter – Articles about advanced core Java programming

Race Condition

Page 6: Thread Bugs War Stories - javaspecialists.eu › talks › pdfs › 2014... · Heinz Kabutz l Author of The Java Specialists' Newsletter – Articles about advanced core Java programming

Page 7: Thread Bugs War Stories - javaspecialists.eu › talks › pdfs › 2014... · Heinz Kabutz l Author of The Java Specialists' Newsletter – Articles about advanced core Java programming

Deadlock

Page 8: Thread Bugs War Stories - javaspecialists.eu › talks › pdfs › 2014... · Heinz Kabutz l Author of The Java Specialists' Newsletter – Articles about advanced core Java programming

Contention

Page 9: Thread Bugs War Stories - javaspecialists.eu › talks › pdfs › 2014... · Heinz Kabutz l Author of The Java Specialists' Newsletter – Articles about advanced core Java programming

Thread Leak

Page 10: Thread Bugs War Stories - javaspecialists.eu › talks › pdfs › 2014... · Heinz Kabutz l Author of The Java Specialists' Newsletter – Articles about advanced core Java programming

Livelock

Page 11: Thread Bugs War Stories - javaspecialists.eu › talks › pdfs › 2014... · Heinz Kabutz l Author of The Java Specialists' Newsletter – Articles about advanced core Java programming

Visibility

Page 12: Thread Bugs War Stories - javaspecialists.eu › talks › pdfs › 2014... · Heinz Kabutz l Author of The Java Specialists' Newsletter – Articles about advanced core Java programming

How Do We Spot A Threading Bug?

Page 13: Thread Bugs War Stories - javaspecialists.eu › talks › pdfs › 2014... · Heinz Kabutz l Author of The Java Specialists' Newsletter – Articles about advanced core Java programming

#1 Persistence

Never give up

Page 14: Thread Bugs War Stories - javaspecialists.eu › talks › pdfs › 2014... · Heinz Kabutz l Author of The Java Specialists' Newsletter – Articles about advanced core Java programming

Never

Page 15: Thread Bugs War Stories - javaspecialists.eu › talks › pdfs › 2014... · Heinz Kabutz l Author of The Java Specialists' Newsletter – Articles about advanced core Java programming

Ever

Page 16: Thread Bugs War Stories - javaspecialists.eu › talks › pdfs › 2014... · Heinz Kabutz l Author of The Java Specialists' Newsletter – Articles about advanced core Java programming

Give

Page 17: Thread Bugs War Stories - javaspecialists.eu › talks › pdfs › 2014... · Heinz Kabutz l Author of The Java Specialists' Newsletter – Articles about advanced core Java programming

Up

Page 18: Thread Bugs War Stories - javaspecialists.eu › talks › pdfs › 2014... · Heinz Kabutz l Author of The Java Specialists' Newsletter – Articles about advanced core Java programming

#2 Luck

Page 19: Thread Bugs War Stories - javaspecialists.eu › talks › pdfs › 2014... · Heinz Kabutz l Author of The Java Specialists' Newsletter – Articles about advanced core Java programming

#3 Don’t Touch

Page 20: Thread Bugs War Stories - javaspecialists.eu › talks › pdfs › 2014... · Heinz Kabutz l Author of The Java Specialists' Newsletter – Articles about advanced core Java programming

#4 Doubt Everything

Page 21: Thread Bugs War Stories - javaspecialists.eu › talks › pdfs › 2014... · Heinz Kabutz l Author of The Java Specialists' Newsletter – Articles about advanced core Java programming

Questions?

Page 22: Thread Bugs War Stories - javaspecialists.eu › talks › pdfs › 2014... · Heinz Kabutz l Author of The Java Specialists' Newsletter – Articles about advanced core Java programming

Thread BugsWar Stories

Dr Heinz M. [email protected]

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