hi, 

there is a memory leak from missingetcompositioncnv in 16.6.x.y-val rel_6. 
https://atlasrtt.cern.ch/get/rtt/rel_6/16.6.x.y-val/build/i686-slc5-gcc43-opt/atlasproduction/recjobtransformtests/mc10_memleak
https://atlasrtt.cern.ch/rtt/rel_6/16.6.x.y-val/build/i686-slc5-gcc43-opt/offline/recjobtransformtests/mc10_memleak/esdtoaod.log
+verbatim+
1 leak (total 36 bytes), originating in:
missingetcompositioncnv::createtransient() (36 bytes)
   0x6dc6c5ba missingetcompositioncnv::createtransient()
   0x6dc7073c t_athenapoolcustomcnv&lt;missingetcomposition, missingetcomposition_p1&gt;::pooltodataobject(dataobject*&amp;, std::string const&amp;)
   0x5bc7fd22 athenapoolconverter::createobj(iopaqueaddress*, dataobject*&amp;)
   0x5a719d46 athcnvsvc::makecall(int, bool, bool, bool, iopaqueaddress*&amp;, dataobject*&amp;)
   0x5a71a3fe athcnvsvc::createobj(iopaqueaddress*, dataobject*&amp;)
   0x5bc94f95 athenapoolcnvsvc::createobj(iopaqueaddress*, dataobject*&amp;)
   0x59f999e0 persistencysvc::makecall(int, iopaqueaddress*&amp;, dataobject*&amp;)
   0x59f99d4f persistencysvc::createobj(iopaqueaddress*, dataobject*&amp;)
   0x5a7ae478 sg::dataproxy::accessdata()
-verbatim-

please fix it. 

this job can be reproduced by 
+verbatim+
reco_trf.py inputrdofile=root://castoratlas//castor/cern.ch/atlas/atlascerngroupdisk/phys-rig/mc10_7tev.105200.t1_mcatnlo_jimmy.digit.rdo.e598_s933_s946_d366_tid197091_00/rdo.197091._000001.pool.root.1 outputesdfile=t1_mcatnlo_jimmy.esd.pool.root outputaodfile=t1_mcatnlo_jimmy.aod.pool.root outputcbntfile=t1_mcatnlo_jimmy.ntup.root maxevents=300 autoconfiguration=everything --athenaopts=--leak-check-execute
-verbatim-

cheers, 
susumu 