exec which no /usr/lib/hadoop/bin/hadoop in missing operand

Hi

Going to url: http://bigdata5.host.int:50111/templeton/v1/ddl/database/?user.name=hive I am getting:
{“statement”:”show databases like ‘*’;”,”error”:”unable to show databases for: *”,”exec”:{“stdout”:””,”stderr”:”which: no /usr/lib/hadoop/bin/hadoop in ((null))\ndirname: missing operand\nTry `dirname –help’ for more information.\n/usr/lib/hadoop/bin/hadoop: line 26: /var/lib/hive-hcatalog/../libexec/hadoop-config.sh: No such file or directory\n/usr/lib/hadoop/bin/hadoop: line 133: exec: : not found\n”,”exitcode”:127}}

Any ideas?