Bug: NPE when INSERT INTO b SELECT * FROM a

Maybe directly related to #10851

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CrateDB version: 4.3.2

Environment description: CrateDB Cloud - Dev Cluster

• 3x 0.25 vCPUs
• 3x 2 GB Memory (0.5 GB Heap)

Problem description:

• 1 TIMESTAMP column (PK)
• ~ 190 DOUBLE PRECISION columns
• ~ 10 TEXT columns

CREATE TABLE open_pv (
    DateTime TIMESTAMPTZ PRIMARY KEY ,
  temperature_outdoor_fantasytown_weather DOUBLE PRECISION,
  ...
  c_phase_voltage_brightcounty_pv DOUBLE PRECISION);

• 103.2 MB (Size primary shard)
• 23,422 records

when creating a second table open_pv2 with the schema as open_pv and trying to copy the data with

INSERT INTO open_pv2 SELECT * FROM open_pv
-- INSERT ERROR (0.000 sec)

this leads to the following error

NullPointerException[Cannot invoke "org.elasticsearch.common.io.stream.Writeable$Reader.read(org.elasticsearch.common.io.stream.StreamInput)" because "this.reader" is null]

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Limiting the number by using LIMIT 10000; the query succedes

INSERT INTO open_pv2 SELECT * FROM open_pv LIMIT 10000;
-- INSERT OK, 10000 rows affected (37.742 sec)

Steps to reproduce:

1. Create Table open_pv

CREATE TABLE open_pv (
    DateTime TIMESTAMPTZ PRIMARY KEY ,
  temperature_outdoor_fantasytown_weather DOUBLE PRECISION,
  ...
  c_phase_voltage_brightcounty_pv DOUBLE PRECISION);

1. Insert ~25.000 rows

2. Create Table open_pv2

CREATE TABLE open_pv2 (
    DateTime TIMESTAMPTZ PRIMARY KEY ,
  temperature_outdoor_fantasytown_weather DOUBLE PRECISION,
  ...
  c_phase_voltage_brightcounty_pv DOUBLE PRECISION);

1. Try to copy table with INSERT SELECT FROM

INSERT INTO open_pv2 SELECT * FROM open_pv
-- INSERT ERROR (0.000 sec)

[seut]

@proddata We’ve fixed this by #10882, it will be part of the next 4.3 release. Thank you again for reporting.

[seut]

@proddata Thank you for that information, we are now able to reproduce the issue and working on a fix.