updated cloudera_manager_impala_queries_exceptions.sh

cloudera_manager_impala_queries_exceptions.sh

@@ -19,6 +19,16 @@
 #
 # <time>    <database>  <user>  <statement may be long>     <error>
 
+# Caveat: this doesn't catch things like:
+#
+# "query_status" : "\nFailed to open HDFS file hdfs://nameservice1/user/hive/warehouse/<database>.db/<table>/part-r-00030-1a234567-8bc9-01d2-e345-678fa901b2c3.snappy.parquet\nError(2): No such file or directory\n",
+#
+# because they have
+#
+# queryState" : "CREATED" instead of queryState" : "EXCEPTION"
+#
+# You can instead find those sorts of things using cloudera_manager_impala_queries_metadata_errors.sh
+
 set -euo pipefail
 [ -n "${DEBUG:-}" ] && set -x
 srcdir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"