On Friday 07 July 2006 05:33, Ola Bini wrote: > Hi David. > > These errors seem very much like the strange things seen sometime when > parsing the gemspec. (There was some mail about this last week on the > list), where it sometimes fails in VERY strange ways. To me it looks > like the error show up when JRuby are handling very much Ruby data at > the same time and somehow gets confused about the type and identity of > objects. > > I've seen this when parsing the gemspec with all three different YAML > systems JRuby has had and other people have seen it too. The typical > symptom is that the parsing ends with some error when it tries to apply > a method on something that is an array, or a string, but should be a > Gem-object. >
Our failures are invariably about XML parsing, and there's no indication that it is getting "type confused". However, it very well may have to do with the overall volume of data (tests). > Regards > Ola Bini > > > We have a "whole bunch" (~75) of tests written in JRuby that test > > portions of > > our J2EE app which runs on JBoss and WebLogic (simultaneously). > > Most of > > these take the form of testing our ReST API. > > > > We get intermittent failures out of these. Nearly always, the > > failure seems > > to have to do with XML parsing (REXML). REXML failures tend to > > come in a one > > of several different ways. Two of the most common are an error > > saying you > > can only have one root node, or that some XPath is not present > > (even though > > it is). I've seen a few other REXML problems, but those are two I > > really > > remember. > > > > The frequency of failure seems to vary by machine. The machines > > that have the > > most problems seem to be our fastest (2.7Ghz) and hyper-threaded. > > On my 2 Ghz machine I see 1-3 with almost every test run. On one > > guy's 1.7 > > Ghz laptop, he rarely sees them. > > > > I generally have to run our whole suite to see the failures, but > > they guys > > with the fastest machines usually can get it with just one test case. > > > > I am *VERY* confident this not a problem in our app, but instead a > > problem in > > JRuby. I've reachd me tolerance for it and would like to find it. > > It is in > > 0.8.2, 0.8.3 and 0.9.0 (and may be more frequent in 0.9.0). > > > > Running the suite on my system takes over 10 minutes, and it fails > > in many > > different locations in different ways (and REXML is not simple to > > debug in > > Ruby, let alone in Java). So, the question is, what *might* be > > happening > > here to cause this? Is there a specific area of JRuby that I might > > want to > > look at. > > > > For sometime I've thought the hyperthreading indicated a > > synchronization > > problem. However, we do not have multiple JRuby threads going ( > > debugged > > with breakpoints on have Thread#start call). We are acting as a > > client to > > WebLogic and JBoss, and WebLogic does start up 10-15 threads, but > > none of > > that code *should* be affecting JRuby. > > > > But given the different frequencies where seeing it on non-hyper- > > threaded > > systems, I wonder if it is not some how related to 'pure speed". > > We have one > > place where we put in a sleep and that seems to reduce the > > frequency of > > failure in that specific location. I'm not sure how a speed could > > matter > > here, but it seems to be common problem. > > > > Please, share your thoughts with me. Ask all the questions you like. > > > > David > > > > Using Tomcat but need to do more? Need to support web services, > > security?Get stuff done quickly with pre-integrated technology to > > make your job easier > > Download IBM WebSphere Application Server v.1.0.1 based on Apache > > Geronimohttp://sel.as- > > us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642_________________ >______________________________ > > > Jruby-devel mailing list > > Jruby-devel@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/jruby-devel > > Using Tomcat but need to do more? Need to support web services, security? > Get stuff done quickly with pre-integrated technology to make your job > easier Download IBM WebSphere Application Server v.1.0.1 based on Apache > Geronimo > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 > _______________________________________________ > Jruby-devel mailing list > Jruby-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/jruby-devel Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Jruby-devel mailing list Jruby-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jruby-devel
