A jaxp test javax/xml/jaxp/unittest/xpath/ClassLoaderTest.java failed on Windows-i586 once(I am not sure if it's related to the specific OS, and I only find it failed once, the same test was passed on the next day) with the following messages:

#section:testng
----------messages:(3/148)----------
command: testng xpath.ClassLoaderTest
reason: Assumed action based on file name: run testng xpath.ClassLoaderTest
elapsed time (seconds): 0.002
result: Error. Can't write `main' argument file


test result: Error. Can't write `main' argument file


Currently all jaxp tests run in othervm mode, and this test looks very common, refering to CODETOOLS-7900043 I think it may be a jtreg issue.