Xinmin Wang created IGNITE-11523:
------------------------------------
Summary: Can't cast null value from Cassandra table primitive
column to primitive value used in domain object model
Key: IGNITE-11523
URL: https://issues.apache.org/jira/browse/IGNITE-11523
Project: Ignite
Issue Type: Bug
Components: cache, cassandra
Affects Versions: 2.7
Reporter: Xinmin Wang
*Issue*
Adding new primitive type columns to the existing tables which have data
existed in
Cassandra causes Ignite to raise an exception (see below) in Ignite 2.7.0 or
2.8.0 nightly build when loading the data from Cassandra into Ignite Cache
store. This works before Ignite 2.6, and even
apache-ignite-fabric-2.7.0.20180918 nightly build.
The assumption seems not correct because both Ignite and Cassandra are (key,
value) store. In fact, SQLLINE tool, we don't need to insert into primitive
value, see the example blow -
CREATE TABLE aa (col1 int PRIMARY KEY, col2 double );
INSERT INTO aa(col1) VALUES (1);
SELECT * FROM aa;
*Root Cause*
This issue is related to the implementation of public static Object
getCassandraColumnValue(Row row, String col, Class clazz, Serializer
serializer) in PropertyMappingHelper.java
([https://github.com/apache/ignite/blob/master/modules/cassandra/store/src/main/java/org/apache/ignite/cache/store/cassandra/common/PropertyMappingHelper.java]).
This class has been changed since 2.7.0. For primitive java type, I don't
think we need to check null value. The assumption is that every row for
primitive types in Cassandra table must have value is not correct.
{panel:title=getCassandraColumnValue(Row row, String col, Class clazz,
Serializer serializer)}
public static Object getCassandraColumnValue(Row row, String col, Class clazz,
Serializer serializer) {
...
if (Long.class.equals(clazz))
return row.isNull(col) ? null : row.getLong(col);
// why needs to check the primitive null. NoSql is a pair of (key, value).
// there is no pair in this case
// all databases (relational databases and NoSql databases support null colum
values)
if (long.class.equals(clazz)) {
if (row.isNull(col)) {
throw new IllegalArgumentException("Can't cast null value from Cassandra table
column '" + col +
"' to " + "long value used in domain object model");
}
return row.getLong(col);
}
}
{panel}
*Detailed Exception*
[2019-03-11
09:44:34,352][ERROR][cassandra-cache-loader-#61%ignite-procurant-purchase-order-cluster%][CassandraCacheStore]
Failed to build Ignite value object from provided Cassandra row
java.lang.IllegalArgumentException: Can't cast null value from Cassandra
table column 'suppliertotamt' to double value used in domain object model
at
org.apache.ignite.cache.store.cassandra.common.PropertyMappingHelper.getCassandraColumnValue(PropertyMappingHelper.java:169)
at
org.apache.ignite.cache.store.cassandra.persistence.PojoField.setValueFromRow(PojoField.java:205)
at
org.apache.ignite.cache.store.cassandra.persistence.PersistenceController.buildObject(PersistenceController.java:405)
at
org.apache.ignite.cache.store.cassandra.persistence.PersistenceController.buildValueObject(PersistenceController.java:227)
at
org.apache.ignite.cache.store.cassandra.session.LoadCacheCustomQueryWorker$1.process(LoadCacheCustomQueryWorker.java:107)
at
org.apache.ignite.cache.store.cassandra.session.CassandraSessionImpl.execute(CassandraSessionImpl.java:402)
at
org.apache.ignite.cache.store.cassandra.session.LoadCacheCustomQueryWorker.call(LoadCacheCustomQueryWorker.java:81)
at
org.apache.ignite.cache.store.cassandra.session.LoadCacheCustomQueryWorker.call(LoadCacheCustomQueryWorker.java:35)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
[2019-03-11
09:44:34,360][ERROR][cassandra-cache-loader-#61%ignite-procurant-purchase-order-cluster%][CassandraCacheStore]
Failed to execute Cassandra loadCache operation
class org.apache.ignite.IgniteException: Failed to execute Cassandra
loadCache operation
at
org.apache.ignite.cache.store.cassandra.session.CassandraSessionImpl.execute(CassandraSessionImpl.java:415)
at
org.apache.ignite.cache.store.cassandra.session.LoadCacheCustomQueryWorker.call(LoadCacheCustomQueryWorker.java:81)
at
org.apache.ignite.cache.store.cassandra.session.LoadCacheCustomQueryWorker.call(LoadCacheCustomQueryWorker.java:35)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: class org.apache.ignite.IgniteException: Failed to build Ignite
value object from provided Cassandra row
at
org.apache.ignite.cache.store.cassandra.session.LoadCacheCustomQueryWorker$1.process(LoadCacheCustomQueryWorker.java:112)
at
org.apache.ignite.cache.store.cassandra.session.CassandraSessionImpl.execute(CassandraSessionImpl.java:402)
... 6 more
Caused by: java.lang.IllegalArgumentException: Can't cast null value from
Cassandra table column 'suppliertotamt' to double value used in domain
object model
at
org.apache.ignite.cache.store.cassandra.common.PropertyMappingHelper.getCassandraColumnValue(PropertyMappingHelper.java:169)
at
org.apache.ignite.cache.store.cassandra.persistence.PojoField.setValueFromRow(PojoField.java:205)
at
org.apache.ignite.cache.store.cassandra.persistence.PersistenceController.buildObject(PersistenceController.java:405)
at
org.apache.ignite.cache.store.cassandra.persistence.PersistenceController.buildValueObject(PersistenceController.java:227)
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
