Clob clobVar = null;
if (result.elementAt(3) != null)
    clobVar = (Clob) result.elementAt(3);

if (clobVar == null) {
    infoTable.put("EInfo", "");
} else {
    stringTemp = clobVar.getSubString(1, (int) clobVar.length());
    infoTable.put("EInfo", stringTemp);
}

clobVar = (Clob) result.elementAt(3);

stringTemp = clobVar.getSubString(1, (int) clobVar.length());

jdbc:db2://localhost:50000/SAMPLE:progressiveStreaming=2;

jdbc:db2://localhost:50000/SAMPLE:driverType=4;fullyMaterializeLobData=true;fullyMaterializeInputStreams=true;progressiveStreaming=2;progresssiveLocators=2;

If everything has worked earlier with same code...but the issue came up after db2 db change, then try below configuration..
<Code>
db2set DB2_RESTRICT_DDF=TRUE
</Code>
It worked for me..