[CAMEL-10146] Groovy language in route and no camel-groovy leads to memory leaks

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Not A Problem
• Affects Version/s: 2.15.5, 2.17.2
• Component/s: camel-core, camel-script
• Estimated Complexity: Unknown
• Flags: Important
• Assignee: Claus Ibsen
• Reporter: Stefano Rocca
• Created: 14/Jul/16 09:30
• Updated: 19/Jul/16 11:22
• Resolved: 19/Jul/16 10:02

Description

Consider this simple route:

<route id="leak">
<from uri="file:///c:/temp/leak/in?move=.done&moveFailed=.error"/>
<setHeader headerName="dummy"><groovy>"dummy" + System.currentTimeMillis()</groovy></setHeader>
<to uri="file:///c:/temp/leak/out"/>
</route>

each time I put a file in c:/temp/leak/in, the number of instances of org.codehaus.groovy.control.CompilerConfiguration increases by one.
Since each CompilerConfiguration, because of this other issue GROOVY-7884, is created anew and contains a BufferedWriter which in turn contains two buffers of 8192 elements (one char[8192] and one byte[8192]), the heap is soon consumed by useless buffers...
Including camel-groovy in the dependencies the problem disappears.