Not Not true. It is working fine in my 4 CCA installations since 3 years for now. ETL version 7.1.000.14. All what Genesys requires is the transparent and stable connection on JDBC layer. Consult with your OracleDBA on that. Just specify correct jdbc-url string in etl.properties and Options\jdbc section of DAP connected to ETL.
Look at attached logs.
ETL_Trans_Only*:* 10:12:01.544 Main.Options Options: {deadlockThreshold=3600, setFi
rstDayOfWeek=2, data-flow-alarm=, updateStatsForLevel0Views=, dropTransferredTables=, CfgUserPa
sswordEncrypted=CDF4EC815DB4C7D4, data-flow-timeout=20, communication-alarm=, dba_user=genesys,
dba_pass=*****, passEncrypted=7D972C50D79810BF, data-flow-check-interval=5, CfgAppName=ETL_Pro
xy, jdbcurl=jdbc:oracle:thin:@(DESCRIPTION=(FAILOVER=ON)(LOAD_BALANCE=ON)(ADDRESS=(PROTOCOL=TCP
)(HOST=host1)(PORT=1521))(ADDRESS=(PROTOCOL=TCP)(HOST=host2)(PORT=1521))(CONNECT_DATA=(SERVICE_
NAME=DATAMART))), chunksAtOnce=16, CfgUser=default, loglevel=WAKE:3,START_WRITE_MON:3,DROP:9,WR
ITE:3,INFO:9,PURGE:9,WARNING:8,ERROR:9,_ALL_:0, updateStatsForTablesAndIndexes=, user=genesys}
ETL_Trans_Only*:* 10:12:01.696 Main.Options Checksums: 5052d804, 433f63fc
ETL_Trans_Only*:* 10:12:01.696 Main TRANSFORM started
ETL_Trans_Only*:* 10:12:04.893 Write.Heartbeat Pulse: 2009/03/20, CET, 3600, 4.1M
ETL_Trans_Only*:* 10:12:06.770 LFolder views OK in LayoutFolder[l:IDOO_1,f:1]
ETL_Trans_Only*:* 10:12:06.881 LFolder views OK in LayoutFolder[l:IDOO_2,f:2]
ETL_Trans_Only*:* 10:12:06.972 LFolder views OK in LayoutFolder[l:IDOO_4,f:4]
ETL_Trans_Only*:* 10:12:07.061 LFolder views OK in LayoutFolder[l:IDOO_3,f:3]
ETL_Trans_Only*:* 10:12:07.156 LFolder views OK in LayoutFolder[l:IDOO_21,f:22