Yes. I always create a new Transformer from XSLT's Template Object for every new thread that is spawned.
I'm wondering why the first few thousands of transformations are running smoothly and then the performance degrades! -----Original Message----- From: Jeff Greif [mailto:jeff.gr...@gmail.com] Sent: Monday, December 12, 2011 9:54 PM To: xalan-j-users@xml.apache.org Subject: Re: Xalan Tranformation Running Slow after about 5K Transformations If I recall correctly, TransformerImpl is not threadsafe, and should be used for one transformation only. So, for each distinct stylesheet, you should have a Templates object, used to create a Transformer for each use. Then there should be no contention for anything used by the Transformer. Jeff On 12/12/2011 6:16 AM, kaja.mohid...@wipro.com wrote: > Hi all, > > > > My java application (running in "Java HotSpot(TM) Server VM (build > 14.0-b16, mixed mode)" on Sun Netra T5440) using Xalan transforms > thousands of XML files (uses 16 Threads). After it transforms about 5000 > XML files, it becomes slow and it starts transforming very slowly and it > takes 2mins for some transformation (where the first transformation of > similar XML with same XSLT ran in just 2 secs). One of the Thread Dump > is as follows > > > > java.lang.Thread.State: BLOCKED > > at java.util.Vector.elementAt(Vector.java:426) > > - waiting to lock <85094f> (a java.util.Vector) owned by > "AggregatorThreadPoolThreadPool-Thread-1" t@17 > > at > org.apache.xalan.templates.ElemTemplateElement.executeNSDecls(ElemTempla teElement.java:1182) > > at > org.apache.xalan.templates.ElemTemplateElement.executeNSDecls(ElemTempla teElement.java:1159) > > at > org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.j ava:1318) > > at > org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(Trans formerImpl.java:2411) > > at > org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.j ava:1374) > > at > org.apache.xalan.templates.ElemForEach.transformSelectedNodes(ElemForEac h.java:423) > > at > org.apache.xalan.templates.ElemForEach.execute(ElemForEach.java:263) > > at > org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(Trans formerImpl.java:2411) > > at > org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.j ava:1374) > > at > org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(Trans formerImpl.java:2411) > > at > org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.j ava:1374) > > at > org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(Trans formerImpl.java:2411) > > at > org.apache.xalan.transformer.TransformerImpl.applyTemplateToNode(Transfo rmerImpl.java:2281) > > at > org.apache.xalan.transformer.TransformerImpl.transformNode(TransformerIm pl.java:1367) > > - locked <4a1e3a> (a org.apache.xml.serializer.ToXMLStream) > > at > org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.j ava:709) > > at > org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.j ava:1284) > > - locked <24f1ed> (a java.lang.Boolean) > > at > org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.j ava:1262) > > > > I couldn't find any bug other than 2336 and 2344 that talks about > Vector. Please share any info, by which I can achieve consistent > performance. > > > > Thanks in advance, > > > > With regards, > > R Kaja Mohideen Please do not print this email unless it is absolutely necessary. The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments. WARNING: Computer viruses can be transmitted via email. The recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email. www.wipro.com
