This patch reverts HBASE-9593 -- i.e. registering in zk before we
register with master putting it back to how it was where we register
in zk AFTER we report for duty with the master (because then we'll
register in zk with the name the master gave us). It then fixes the
problem reported in HBASE-9593 in an alternate fashion by checking
for a RS znode if we failed a connect on assign; if none found, we
remove a server from online servers list.
M hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
Make move method available to tests.
M hbase-server/src/main/java/org/apache/hadoop/hbase/master/ServerManager.java
Correct method name changing moveFromOnelineToDeadServers to
moveFromOnlineToDeadServers
Add actual fix which is call to checkForRSznode if exception trying to
open a region; if none found, call expire on the server so it gets
removed from the list of online servers.
This patch exposes sloppyness in the waitForRegionServers around our
current case where Master is hosting regions but ONLY hbase:meta;
in this case we need to wait on at least another server to report
in beyond Master (we weren't but stuff was 'working' because of the
early registration of RS nodes in zk).
M hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
Make 'killed' available to tests.
Put registry of ephemeral node back to where it was originally,
so it is AFTER we get response from Master on registering for duty
so we can put our znode up in zk with the name the Master gave us
rather than local name (which could be unknown to the Master).
private boolean stopping = false;
M hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRSKilledWhenInitializing.java
Cleanup and test of new cleanup.
The special "auth" ZK ACL scheme will always set the ACL's id (the
user who is allowed) to be the authenticated user of the ZK connection.
This results in the HBase superuser not actually receiving the
permissions as the ZKUtil intends to do. Since we know we have security
enabled, we can instead explicitly list "sasl" as the ACL scheme
instead.
Bug Fix : Added Memory block type also to the list of
evictions that need to happen when there is a needForExtra
Improvement : Inorder to fix the non availabilty of Buckets and force
the movement of buckets to transformed sizes, whenever we encounter a
situation where an allocation cant be made for a BucketSize, we will
forcefully free the entire buckets that have least occupancy ratio. This
is the same strategy used by MemCached when they encounter a similar
issue going by the name 'Slab Calcification'. Only improvement is that
we use a heuristic to evict from the buckets that are least occupied
and also avoid the BucketSizes where there is a single Bucket
Signed-off-by: Ramkrishna <ramkrishna.s.vasudevan@intel.com>
Xiang Li
qgxiaozhan
Nemo Chen
Esteban Gutierrez
Jerry He
Tomu Tsuruhara
Yu Li
Yi Liang
Karan Mehta
Ramkrishna
tedyu
Ashu Pachauri
Chia-Ping Tsai
zhangduo
Michael Stack
Andrew Purtell
James Moore
Guanghao Zhang
Stephen Yuan Jiang
Umesh Agashe
chenyechao
Phil Yang
Josh Elser
dvdreddy