Backport #10540 to jetty-10.0.x Fixed deadlock in class initialization.
#10545
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* Thread T1 may initialize HttpTester.Message that extends MutableHttpFields, so grabs the lock for the initialization of class MutableHttpFields. * Thread T2 may initialize HttpFields, so grabs the lock for HttpFields and initializes field EMPTY, which calls new MutableHttpFields. * To initialize MutableHttpFields, T1 must initialize HttpFields, but sees that its lock is taken and waits. * To initialize HttpFields, T2 must create an instance and therefore initialize MutableHttpFields, but sees that its lock is taken and waits. * Deadlock. The solution is to use another class, EmptyHttpFields, to initialize HttpFields.EMPTY, so that there is no deadlock. Signed-off-by: Simone Bordet <simone.bordet@gmail.com>
Signed-off-by: Joakim Erdfelt <joakim.erdfelt@gmail.com>
lorban
approved these changes
Sep 18, 2023
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Backport of PR #10540 for
jetty-10.0.xThe solution is to use another class, EmptyHttpFields, to initialize HttpFields.EMPTY, so that there is no deadlock.