Hey guys, I am playing with Kudu Java client (wow it is fast), using mostly code from Kudu Java example.
While learning about exceptions during rows inserts, I stumbled upon something I could not explain. If I insert 10 rows into a brand new Kudu table (AUTO_FLUSH_BACKGROUND mode) and I make one row to be "bad" intentionally (one column cannot be NULL), I actually get 3 rows that cannot be inserted into Kudu, not 1 as I was expected. But if I do session.flush() after every single insert, I get only one error row (but this ruins the purpose of AUTO_FLUSH_BACKGROUND mode). Any ideas one? We cannot afford losing data and need to track all rows which cannot be inserted. AUTO_FLUSH mode works much better and I do not have an issue like above, but then it is way slower than AUTO_FLUSH_BACKGROUND. My code is below. It is in Groovy, but I think you will get an idea :) https://gist.github.com/boristyukin/8703d2c6ec55d6787843aa133920bf01 Here is output from my test code that hopefully illustrates my confusion - out of 10 rows inserted, 9 should be good and 1 bad, but it turns out Kudu flagged 3 as bad: Created table kudu_groovy_example Inserting 10 rows in AUTO_FLUSH_BACKGROUND flush mode ... (int32 key=1, string value="value 1", unixtime_micros dt_tm=2018-11-16T20:57:03.469000Z) (int32 key=2, string value=NULL) BAD ROW (int32 key=3, string value="value 3", unixtime_micros dt_tm=2018-11-16T20:57:03.595000Z) (int32 key=4, string value=NULL, unixtime_micros dt_tm=2018-11-16T20:57:03.596000Z) (int32 key=5, string value="value 5", unixtime_micros dt_tm=2018-11-16T20:57:03.597000Z) (int32 key=6, string value=NULL, unixtime_micros dt_tm=2018-11-16T20:57:03.597000Z) (int32 key=7, string value="value 7", unixtime_micros dt_tm=2018-11-16T20:57:03.598000Z) (int32 key=8, string value=NULL, unixtime_micros dt_tm=2018-11-16T20:57:03.602000Z) (int32 key=9, string value="value 9", unixtime_micros dt_tm=2018-11-16T20:57:03.603000Z) (int32 key=10, string value=NULL, unixtime_micros dt_tm=2018-11-16T20:57:03.603000Z) 3 errors inserting rows - why 3???? only 1 expected to be bad... there were errors inserting rows to Kudu the first few errors follow: ??? key 1 and 6 supposed to be fine! Row error for primary key=[-128, 0, 0, 1], tablet=null, server=null, status=Invalid argument: No value provided for required column: dt_tm[unixtime_micros NOT NULL] (error 0) Row error for primary key=[-128, 0, 0, 2], tablet=null, server=null, status=Invalid argument: No value provided for required column: dt_tm[unixtime_micros NOT NULL] (error 0) Row error for primary key=[-128, 0, 0, 6], tablet=null, server=null, status=Invalid argument: No value provided for required column: dt_tm[unixtime_micros NOT NULL] (error 0) Rows counted in 485 ms Table has 7 rows - ??? supposed to be 9! INT32 key=4, STRING value=NULL, UNIXTIME_MICROS dt_tm=2018-11-16T20:57:03.596000Z INT32 key=8, STRING value=NULL, UNIXTIME_MICROS dt_tm=2018-11-16T20:57:03.602000Z INT32 key=9, STRING value=value 9, UNIXTIME_MICROS dt_tm=2018-11-16T20:57:03.603000Z INT32 key=3, STRING value=value 3, UNIXTIME_MICROS dt_tm=2018-11-16T20:57:03.595000Z INT32 key=10, STRING value=NULL, UNIXTIME_MICROS dt_tm=2018-11-16T20:57:03.603000Z INT32 key=5, STRING value=value 5, UNIXTIME_MICROS dt_tm=2018-11-16T20:57:03.597000Z INT32 key=7, STRING value=value 7, UNIXTIME_MICROS dt_tm=2018-11-16T20:57:03.598000Z
