FWK005 parse error with Webservice sampler and 10+threads

[asfimport]

Ivan Rancati (Bug 38840):
I have a relatively simple JMeter WebService test plan, where I have the
following as listeners:
Aggregate Report
Assertion Results
View Results Tree

The

The plan runs against a XFire web service (although I have seen exactly the same
issue with an Axis server)

When I run it with 2 to 5 threads, all tests pass
If I use 10 threads, occasionally a test would fail.
Inspecting the sampled XML shows no problem, but if I check in the Assertion
Results viewer I see this line

Error in building: FWK005 parse may not be called while parsing.: FWK005 parse
may not be called while parsing.

I have run the test requests through a proxy, and the message is definitely not
coming from the Web Service, it's from JMeter.
From a quick Google search, it might be a problem with the fact that some XML
parsing is not thread safe.

Severity: normal
OS: Linux

[asfimport]

Ivan Rancati (migrated from Bugzilla):
Created attachment ws-pp.jmx: Test plan that shows the parsing issue

[asfimport]

Ivan Rancati (migrated from Bugzilla):
See for example the error at line 11677

Created attachment jmeter.zip: contains jmeter.log with debug settings

[asfimport]

Sebb (migrated from Bugzilla):
Sorry for the delay in looking at this.

XMLAssertion currently uses only a single jdom SAXBuilder for all threads, but
jdom is not thread-safe.

The code in the 2.1 branch has been updated to use a thread-local builder.