Question

In my MySQL:

mysql> select * from cc;
+----+------+
| id | name |
+----+------+
|  1 | aa   |
|  2 | bb   |
+----+------+
2 rows in set (0.00 sec)

and elasticsearch jdbc river is:

curl -XPUT 'localhost:9201/_river/my_jdbc_river/_meta' -d '{
    "type" : "jdbc",
    "jdbc" : {
        "driver" : "com.mysql.jdbc.Driver",
        "url" : "jdbc:mysql://localhost:3301/test",
        "user" : "root",
        "password" : "root",
    "poll" : "10s",
    "strategy" : "simple",
        "sql" : "select * from cc"
    }
}'

but,I don’t understand elasticsearch index data why result is:

aa
bb
aa
bb
aa
aa
aa
bb
bb
bb

I think result like this:

aa
bb

please help me, and thanks gsc-leticia help me format this question content.

Answer 1

You did not define an _id so the river add your documents every minutes.

You should define your river with something like:

curl -XPUT 'localhost:9201/_river/my_jdbc_river/_meta' -d '{
    "type" : "jdbc",
    "jdbc" : {
        "driver" : "com.mysql.jdbc.Driver",
        "url" : "jdbc:mysql://localhost:3301/test",
        "user" : "root",
        "password" : "root",
    "poll" : "10s",
    "strategy" : "simple",
        "sql" : "select id as _id, name from cc"
    }
}'

See JDBC River documentation for details.