XPathBuilder doesn't clear ThreadLocal with exchange after evaluation
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Key: CAMEL-3813
URL: https://issues.apache.org/jira/browse/CAMEL-3813
Project: Camel
Issue Type: Bug
Components: camel-core
Affects Versions: 2.7.0
Reporter: Marcin Kolda
XPathBuilder doesn't clear ThreadLocal with exchange (and variableResolver)
after evaluation. In such case reference to current exchange (and body,
headers, properties, etc.) remains in Thread until current thread dies or
evaluates new exchange with the same XPathBuilder instance.
The result of this is that each thread can contain references to multiple
exchanges (up to the number of xpaths in camel context), that can't be
collected by GC.
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