Behavioral Changes
Behavioral changes denote a marked change in behavior from the previously released version to this version of software. In HDP 2.5.3, behavioral changes affect the following Hadoop components.
Table 1.6. Behavioral Changes
| Hortonworks Bug ID | Apache Component | Apache JIRA | Summary | Details |
|---|---|---|---|---|
| Falcon | Berkeley DB JAR file must be downloaded | Starting with the HDP 2.5.0 release, customers must obtain the Berkeley DB JAR file (available under open source license from Oracle) as part of a Falcon installation or upgrade. See the Data Movement and Integration guide for more information. | ||
| BUG-66121 | Hive | HIVE-14251 | Union All of different types resolves to incorrect data |
Scenario: UNION result handling Previous Behavior: queries in which union operator was used may have created an invalid output type.for example, the column type is ambigous in the following query: select cast(1 as int) union select cast(1 as string) Selecting the inappropriate type may cause the value to be changed to
New Behavior: The types are checked prior to execution; and the ambigous cases are rejected; FAILED: SemanticException Schema of both sides of union should match: Column _c0 is of type int on first table and type string on second table. Cannot tell the position of null AST. (state=42000,code=40000) The query should be clarified with explicit casts. |