I'm seeing a very deep stack for a simple route and I'm wondering... why it is
so deep?
Testing with a class like:
<snip>
public class BasicCamelTrial
extends TestSupport
{
@Test
public void showStackDepthForSimpleRoute() throws Exception {
DefaultCamelContext camel = new DefaultCamelContext();
camel.disableJMX();
camel.addRoutes(new RouteBuilder()
{
@Override
public void configure() throws Exception {
from("direct:foo").to("direct:bar");
from("direct:bar").process(new Processor()
{
@Override
public void process(Exchange exchange) throws Exception {
Throwable t = new Throwable("MARKER");
log("HERE; stack size: {}", t.getStackTrace().length,
t);
}
});
}
});
camel.start();
ProducerTemplate producer = camel.createProducerTemplate();
producer.sendBody("direct:foo", "Hello");
producer.stop();
camel.stop();
}
}
</snip>
Shows stack is:
<snip>
java.lang.Throwable: MARKER
at BasicCamelTrial$1$1.process(BasicCamelTrial.java:39)
[test-classes/:na]
at
org.apache.camel.impl.converter.AsyncProcessorTypeConverter$ProcessorToAsyncProcessorBridge.process(AsyncProcessorTypeConverter.java:50)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:98)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:89)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:98)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:89)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.processor.interceptor.TraceInterceptor.process(TraceInterceptor.java:90)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.processor.RedeliveryErrorHandler.processErrorHandler(RedeliveryErrorHandler.java:318)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:209)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.processor.DefaultChannel.process(DefaultChannel.java:306)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.processor.UnitOfWorkProcessor.process(UnitOfWorkProcessor.java:111)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:98)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:89)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:69)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.component.direct.DirectProducer.process(DirectProducer.java:61)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.processor.SendProcessor$2.doInAsyncProducer(SendProcessor.java:114)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.impl.ProducerCache.doInAsyncProducer(ProducerCache.java:284)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.processor.SendProcessor.process(SendProcessor.java:109)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:98)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:89)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.processor.interceptor.TraceInterceptor.process(TraceInterceptor.java:90)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.processor.RedeliveryErrorHandler.processErrorHandler(RedeliveryErrorHandler.java:318)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.processor.RedeliveryErrorHandler.process(RedeliveryErrorHandler.java:209)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.processor.DefaultChannel.process(DefaultChannel.java:306)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.processor.UnitOfWorkProcessor.process(UnitOfWorkProcessor.java:111)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:98)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:89)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:69)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:78)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.component.direct.DirectProducer.process(DirectProducer.java:61)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.processor.UnitOfWorkProcessor.processAsync(UnitOfWorkProcessor.java:139)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.processor.UnitOfWorkProcessor.process(UnitOfWorkProcessor.java:106)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:104)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:85)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.processor.UnitOfWorkProducer.process(UnitOfWorkProducer.java:63)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.impl.ProducerCache$2.doInProducer(ProducerCache.java:351)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.impl.ProducerCache$2.doInProducer(ProducerCache.java:323)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.impl.ProducerCache.doInProducer(ProducerCache.java:222)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.impl.ProducerCache.sendExchange(ProducerCache.java:323)
[camel-core-2.8.3.jar:2.8.3]
at org.apache.camel.impl.ProducerCache.send(ProducerCache.java:168)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.impl.DefaultProducerTemplate.send(DefaultProducerTemplate.java:110)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.impl.DefaultProducerTemplate.sendBody(DefaultProducerTemplate.java:123)
[camel-core-2.8.3.jar:2.8.3]
at
org.apache.camel.impl.DefaultProducerTemplate.sendBody(DefaultProducerTemplate.java:130)
[camel-core-2.8.3.jar:2.8.3]
at
BasicCamelTrial.showStackDepthForSimpleRoute(BasicCamelTrial.java:48)
[test-classes/:na]
... trimmed out test launcher ...
</snip>
I ran with a few other routes (a simple a -> b) and a more complicated (a -> b
-> c) and it looks like each route adds 19 stack trace elements. Is this the
expected behavior of camel by default? Is there any way to optimize the
message flow for simple routes?
--jason
