spring-framework

Spring Framework

Tree: bb744574e5

Andy Clement c1edb3b5bd Enforce limit on classes loaded by Spel compiled expression loader Until this change a single classloader was used to load all compiled SpEL expressions. This meant in a context where an expression was repeatedly flipping between compiled and interpreted mode (which can happen if in MIXED mode compilation and changing the context around the evaluation) the classloader would continually load a new compiled version but not orphan the old compiled version. This eventually uses up all the memory as the number of classes is ever increasing. With this change classloaders are used to load 100 compiled expressions. The 101st will be loaded by a new one. Orphaning the old classloader means if an expression is ever recompiled there is more likely to be no anchored references left to the older compiled form and it can be GC'd. In the MIXED situation above it should help alleviate the problem of older classes never being candidates for GC. Issue: SPR-15460	9 years ago
..
main	Enforce limit on classes loaded by Spel compiled expression loader	9 years ago
test	Enforce limit on classes loaded by Spel compiled expression loader	9 years ago

Andy Clement c1edb3b5bd Enforce limit on classes loaded by Spel compiled expression loader

Until this change a single classloader was used to load
all compiled SpEL expressions. This meant in a context where an
expression was repeatedly flipping between compiled and interpreted
mode (which can happen if in MIXED mode compilation and changing
the context around the evaluation) the classloader would continually
load a new compiled version but not orphan the old compiled version.
This eventually uses up all the memory as the number of classes
is ever increasing.

With this change classloaders are used to load 100 compiled
expressions. The 101st will be loaded by a new one. Orphaning the
old classloader means if an expression is ever recompiled there
is more likely to be no anchored references left to the older
compiled form and it can be GC'd. In the MIXED situation above it
should help alleviate the problem of older classes never being
candidates for GC.

Issue: SPR-15460

9 years ago

main

Enforce limit on classes loaded by Spel compiled expression loader

9 years ago

test

Enforce limit on classes loaded by Spel compiled expression loader

9 years ago