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ambari-server/src/main/resources/custom_actions/scripts/remove_bits.py (line 46) <https://reviews.apache.org/r/39955/#comment163580> We may need to test this on other OS'es. - Alejandro Fernandez On Nov. 4, 2015, 10:38 p.m., Alejandro Fernandez wrote: > > ----------------------------------------------------------- > This is an automatically generated e-mail. To reply, visit: > https://reviews.apache.org/r/39955/ > ----------------------------------------------------------- > > (Updated Nov. 4, 2015, 10:38 p.m.) > > > Review request for Ambari, Dmytro Grinenko, Dmitro Lisnichenko, Jayush > Luniya, Nate Cole, and Swapan Shridhar. > > > Bugs: AMBARI-13723 > https://issues.apache.org/jira/browse/AMBARI-13723 > > > Repository: ambari > > > Description > ------- > > We found a major flaw in the Express Upgrade from 2.1->2.3. Basically, > "hadoop" bin still points to the old binary because we had to install HDP 2.3 > while 2.1 bits still existed. > > **Manual Upgrade Instructions:** > > * Stop all services using 2.1 > * yum erase hadoop hdfs hive … (this will remove scripts /usr/bin/hadoop, > /usr/bin/hdfs, /usr/bin/hive, etc/) > * yum install hadoop_2_3_* hdfs_2_3_* hive_2_3_* (rpm should point > /usr/bin/hadoop -> /usr/hdp/current/hadoop-client/bin/hadoop) > * Change the version to 2.3 (hdp-select, conf-select, etc.) > * Start all services, and hence MR Service Check passes with "hadoop" command > > **Express Upgrade:** > > * Install HDP 2.3 bits. We reused the RU framework that relies on a 2 step > process: install bits, perform upgrade. Hence, /usr/bin/hadoop is still using > 2.1 bits > * Stop all services using 2.1 > * Change the version to 2.3 (hdp-select, conf-select, etc.) > * Start all services, will fail on MR Service Check because ExecuteHadoop() > resource calls "hadoop" command, which is still pointing to 2.1 bits! > > One solution is for the orchestration to remove the 2.1 bits before starting > using 2.3. > Uninstalling the 2.1 bits will remove /usr/bin/hadoop, but when we call > "hdp-select set hadoop-client <new_version>" it will create the symlink > /usr/bin/hadoop -> /usr/hdp/current/hadoop-client/bin/hadoop > > > Diffs > ----- > > ambari-server/src/main/resources/custom_actions/scripts/remove_bits.py > PRE-CREATION > > ambari-server/src/main/resources/stacks/HDP/2.1/upgrades/nonrolling-upgrade-2.3.xml > 91d4f64 > > Diff: https://reviews.apache.org/r/39955/diff/ > > > Testing > ------- > > Verified during Express Upgrade from HDP 2.1->2.3 > > > Thanks, > > Alejandro Fernandez > >
