API Compatibility changes in 7.1.9 for Hadoop
Removed or Modified APIs in CDP 7.1.9 for Hadoop and recommendations for how to handle them.
Apache Base Version of Hadoop in 7.1.7 SP2 was 3.1.1 and Apache Base Version of Hadoop in 7.1.9 is 3.1.1. The Cloudera version 7.1.9 has additional improvements over the Apache Base version.
Removed APIs in 7.1.9
The following APIs are no longer available for Hadoop in CDP 7.1.9
QueueInfo.newInstance
Method Removed
- Package Name
- org.apache.hadoop.yarn.api.records
- Effect
- A client program may be interrupted by NoSuchMethodError exception.
- Reason for change
- YARN-10891
- Recommendation
- Method signature changed, new parameter: maxParallelApps. If a client application calls this method, it should apply this new parameter as well.
- Recompilation Required?
- Yes
RemoteIterators.toArray
Method Removed
- Package Name
- org.apache.hadoop.util.functional
- Effect
- A client program may be interrupted by NoSuchMethodError exception.
- Reason for change
- HADOOP-17511
- Recommendation
- Method signature changed, new parameter: source. If a client application calls this method, it should apply this new parameter as well.
- Recompilation Required?
- Yes
Modified APIs in 7.1.9
The following APIs have been modified for Hadoop and include a description of the impact of the modifiaction on their use.
QueueInfo
Abstract method void setMaxParallelApps ;int) has been added to this class.
- Package Name
- org.apache.hadoop.yarn.api.records
- Effect
- Recompilation of a client program may be terminated with the message: a client class C is not abstract and does not override abstract method setMaxParallelApps(int) in org.apache.hadoop.yarn.api.records.QueueInfo.
- Reason for change
- YARN-10891
- Recommendation
- If a class extends QueueInfo in a client applications, it must implement setMaxParallelApps abstract method.
- Recompilation Required?
- Yes
QueueInfo
Abstract method int getMaxParallelApps() has been added to this class.
- Package Name
- org.apache.hadoop.yarn.api.records
- Effect
- Recompilation of a client program may be terminated with the message: a client class C is not abstract and does not override abstract method getMaxParallelApps() in org.apache.hadoop.yarn.api.records.QueueInfo.
- Reason for change
- YARN-10891
- Recommendation
- If a class extends QueueInfo in a client applications, it must implement getMaxParallelApps abstract method.
- Recompilation Required?
- Yes
QueueInfo
Abstract method int getMaxParallelApps() has been added to this class.
- Package Name
- org.apache.hadoop.yarn.api.records
- Effect
- A client program may be interrupted by AbstractMethodError exception. Added abstract method is called in 2nd library version by the method org.apache.hadoop.yarn.client.cli.QueueCLI.printQueueInfo(PrintWriter; QueueInfo) and may not be implemented by old clients.
- Reason for change
- YARN-10891
- Recommendation
- If a class extends QueueInfo in a client applications, it must implement getMaxParallelApps abstract method.
- Recompilation Required?
- Yes
