Move to a new AssignmentManager, one that describes Assignment using
a State Machine built on top of ProcedureV2 facility.
This doc. keeps state on where we are at w/ the new AM:
https://docs.google.com/document/d/1eVKa7FHdeoJ1-9o8yZcOTAQbv0u0bblBlCCzVSIn69g/edit#heading=h.vfdoxqut9lqn
Includes list of tests disabled by this patch with reasons why.
Based on patches from Matteos' repository and then fix up to get it all to pass cluster
tests, filling in some missing functionality, fix of findbugs, fixing bugs, etc..
including:
1. HBASE-14616 Procedure v2 - Replace the old AM with the new AM.
The basis comes from Matteo's repo here:
689227fcbf
Patch replaces old AM with the new under subpackage master.assignment.
Mostly just updating classes to use new AM -- import changes -- rather
than the old. It also removes old AM and supporting classes.
See below for more detail.
2. HBASE-14614 Procedure v2 - Core Assignment Manager (Matteo Bertozzi)
3622cba4e3
Adds running of remote procedure. Adds batching of remote calls.
Adds support for assign/unassign in procedures. Adds version info
reporting in rpc. Adds start of an AMv2.
3. Reporting of remote RS version is from here:
ddb4df3964.patch
4. And remote dispatch of procedures is from:
186b9e7c4d
5. The split merge patches from here are also melded in:
9a3a95a2c2
and d6289307a0
We add testing util for new AM and new sets of tests.
Does a bunch of fixup on logging so its possible to follow a procedures' narrative by grepping
procedure id. We spewed loads of log too on big transitions such as master fail; fixed.
Fix CatalogTracker. Make it use Procedures doing clean up of Region data on split/merge.
Without these changes, ITBLL was failing at larger scale (3-4hours 5B rows) because we were
splitting split Regions among other things (CJ would run but wasn't
taking lock on Regions so havoc).
Added a bunch of doc. on Procedure primitives.
Added new region-based state machine base class. Moved region-based
state machines on to it.
Found bugs in the way procedure locking was doing in a few of the
region-based Procedures. Having them all have same subclass helps here.
Added isSplittable and isMergeable to the Region Interface.
Master would split/merge even though the Regions still had
references. Fixed it so Master asks RegionServer if Region
is splittable.
Messing more w/ logging. Made all procedures log the same and report
the state the same; helps when logging is regular.
Rewrote TestCatalogTracker. Enabled TestMergeTableRegionProcedure.
Added more functionality to MockMasterServices so can use it doing
standalone testing of Procedures (made TestCatalogTracker use it
instead of its own version).
Add to MasterServices ability to wait on Master being up -- makes
it so can Mock Master and start to implement standalone split testing.
Start in on a Split region standalone test in TestAM.
Fix bug where a Split can fail because it comes in in the middle of
a Move (by holding lock for duration of a Move).
Breaks CPs that were watching merge/split. These are run by Master now
so you need to observe on Master, not on RegionServer.
Details:
M hbase-client/src/main/java/org/apache/hadoop/hbase/ClusterStatus.java
Takes List of regionstates on construction rather than a Set.
NOTE!!!!! This is a change in a public class.
M hbase-client/src/main/java/org/apache/hadoop/hbase/HRegionInfo.java
Add utility getShortNameToLog
M hbase-client/src/main/java/org/apache/hadoop/hbase/client/ConnectionImplementation.java
M hbase-client/src/main/java/org/apache/hadoop/hbase/client/ShortCircuitMasterConnection.java
Add support for dispatching assign, split and merge processes.
M hbase-client/src/main/java/org/apache/hadoop/hbase/master/RegionState.java
Purge old overlapping states: PENDING_OPEN, PENDING_CLOSE, etc.
M hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/Procedure.java
Lots of doc on its inner workings. Bug fixes.
M hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/ProcedureExecutor.java
Log and doc on workings. Bug fixes.
A hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/RemoteProcedureDispatcher.java
Dispatch remote procedures every 150ms or 32 items -- which ever
happens first (configurable). Runs a timeout thread. This facility is
not on yet; will come in as part of a later fix. Currently works a
region at a time. This class carries notion of a remote procedure and of a buffer full of these.
"hbase.procedure.remote.dispatcher.threadpool.size" with default = 128
"hbase.procedure.remote.dispatcher.delay.msec" with default = 150ms
"hbase.procedure.remote.dispatcher.max.queue.size" with default = 32
M hbase-client/src/main/java/org/apache/hadoop/hbase/shaded/protobuf/ProtobufUtil.java
Add in support for merge. Remove no-longer used methods.
M hbase-protocol-shaded/src/main/protobuf/Admin.proto b/hbase-protocol-shaded/src/main/protobuf/Admin.proto
Add execute procedures call ExecuteProcedures.
M hbase-protocol-shaded/src/main/protobuf/MasterProcedure.proto
Add assign and unassign state support for procedures.
M hbase-server/src/main/java/org/apache/hadoop/hbase/client/VersionInfoUtil.java
Adds getting RS version out of RPC
Examples: (1.3.4 is 0x0103004, 2.1.0 is 0x0201000)
M hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
Remove periodic metrics chore. This is done over in new AM now.
Replace AM with the new. Host the procedures executor.
M hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterMetaBootstrap.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterMetaBootstrap.java
Have AMv2 handle assigning meta.
M hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterRpcServices.java
Extract version number of the server making rpc.
A hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/AssignProcedure.java
Add new assign procedure. Runs assign via Procedure Dispatch.
There can only be one RegionTransitionProcedure per region running at the time,
since each procedure takes a lock on the region.
D hbase-server/src/main/java/org/apache/hadoop/hbase/master/AssignCallable.java
D hbase-server/src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java
D hbase-server/src/main/java/org/apache/hadoop/hbase/master/BulkAssigner.java
D hbase-server/src/main/java/org/apache/hadoop/hbase/master/GeneralBulkAssigner.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/GeneralBulkAssigner.java
Remove these hacky classes that were never supposed to live longer than
a month or so to be replaced with real assigners.
D hbase-server/src/main/java/org/apache/hadoop/hbase/master/RegionStateStore.java
D hbase-server/src/main/java/org/apache/hadoop/hbase/master/RegionStates.java
D hbase-server/src/main/java/org/apache/hadoop/hbase/master/UnAssignCallable.java
A hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/AssignmentManager.java
A procedure-based AM (AMv2).
TODO
- handle region migration
- handle meta assignment first
- handle sys table assignment first (e.g. acl, namespace)
- handle table priorities
"hbase.assignment.bootstrap.thread.pool.size"; default size is 16.
"hbase.assignment.dispatch.wait.msec"; default wait is 150
"hbase.assignment.dispatch.wait.queue.max.size"; wait max default is 100
"hbase.assignment.rit.chore.interval.msec"; default is 5 * 1000;
"hbase.assignment.maximum.attempts"; default is 10;
A hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/MoveRegionProcedure.java
Procedure that runs subprocedure to unassign and then assign to new location
A hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/RegionStateStore.java
Manage store of region state (in hbase:meta by default).
A hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/RegionStates.java
In-memory state of all regions. Used by AMv2.
A hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/RegionTransitionProcedure.java
Base RIT procedure for Assign and Unassign.
A hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/UnassignProcedure.java
Unassign procedure.
A hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/RSProcedureDispatcher.java
Run region assignement in a manner that pays attention to target server version.
Adds "hbase.regionserver.rpc.startup.waittime"; defaults 60 seconds.
The default behavior for abort() method of StateMachineProcedure is changed to support aborting all procedures irrespective of if rollback is supported or not. Currently its observed that sometimes procedures may fail on a step which will be considered as retryable error as abort is not supported. As a result procedure may stuck in a endless loop repeating same step again.User should have an option to abort any stuck procedure and do clean up manually. Please refer to HBASE-18016 and discussion there.
Signed-off-by: Michael Stack <stack@apache.org>
Earlier when queues had locks, clearQueue() also cleaned up old locks when AbstractProcedureScheduler.clear() was called to reset scheduler for testing failure and recovery.
Now with locks decoupled from queues, they need to be separately cleaned up.
We can't have clearLocks() as abstract method in AbstractProcedureScheduler because at that level, a procedure scheduler is just a queue. It's only in MasterProcedureScheduler that locks come into picture. So directly overriding clear() method in MPS.
Earlier when queues had locks, clearQueue() also cleaned up old locks when AbstractProcedureScheduler.clear() was called.
Now with locks decoupled from queues, they need to be separately cleaned up.
We can't have clearLocks() as abstract method in AbstractProcedureScheduler because at that level, a procedure scheduler is just a queue. It's only in MasterProcedureScheduler that locks come into picture. So directly overriding clear() method in MPS.
Change-Id: If1a0acb418a79f98ce6155541edb0c1e621638e3
- Moved locks out of MasterProcedureScheduler#Queue. One Queue object is used for each namespace/table, which aren't more than 100. So we don't need complexity arising from all functionalities being in one place. SchemaLocking now owns locks and locking implementaion has been moved to procedure2 package.
- Removed NamespaceQueue because it wasn't being used as Queue (add,peek,poll,etc functions threw UnsupportedOperationException). It's was only used for locks on namespaces. Now that locks have been moved out of Queue class, it's not needed anymore.
- Remoed RegionEvent which was there only for locking on regions. Tables/namespaces used locking from Queue class and regions couldn't (there are no separate proc queue at region level), hence the redundance. Now that locking is separate, we can use the same for regions too.
- Removed QueueInterface class. No declarations, except one implementaion, which makes the point of having an interface moot.
- Removed QueueImpl, which was the only concrete implementation of abstract Queue class. Moved functions to Queue class itself to avoid unnecessary level in inheritance hierarchy.
- Removed ProcedureEventQueue class which was just a wrapper around ArrayDeque class. But we now have ProcedureWaitQueue as 'Type class'.
- Encapsulated table priority related stuff in a single class.
- Removed some unused functions.
Change-Id: I6a60424cb41e280bc111703053aa179d9071ba17
M TestStressWALProcedureStore.java
Disable test that now runs that fails because of difference in pb3.1.0.
Signed-off-by: Michael Stack <stack@apache.org>
This is an amalgam of https://reviews.apache.org/r/54435/ and
9c14863594
Removes notion of suspend/resume from procedure. Instead have the below lock states
and just unschedule if lock is not yet available
LOCK_ACQUIRED should be returned when the proc has the lock and the proc is ready to execute.
LOCK_YIELD_WAIT should be returned when the proc has not the lock and the framework
should take care of readding the procedure back to the runnable set for retry
LOCK_EVENT_WAIT should be returned when the proc has not the lock and someone will take care of
readding the procedure back to the runnable set when the lock is available.
Side benefit is being able to undo a bunch of synchronization around
procedure management.
Signed-off-by: Michael Stack <stack@apache.org>
locks on tables/namespaces/regions (Matteo Bertozzi)
Incorporates review comments from
https://reviews.apache.org/r/52589/https://reviews.apache.org/r/54388/
M hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncTableBase.java
Fix for eclipse complaint (from Duo Zhang)
M hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/Procedure.java
M hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/ProcedureExecutor.java
M hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/store/wal/WALProcedureStore.java
Log formatting
M hbase-procedure/src/test/java/org/apache/hadoop/hbase/procedure2/ProcedureTestingUtility.java
Added wait procedures utility.
A hbase-protocol-shaded/src/main/java/org/apache/hadoop/hbase/shaded/protobuf/generated/LockServiceProtos.java
A hbase-protocol-shaded/src/main/protobuf/LockService.proto b/hbase-protocol-shaded/src/main/protobuf/LockService.proto
Implement new locking CP overrides.
A hbase-server/src/main/java/org/apache/hadoop/hbase/client/locking/EntityLock.java
New hbase entity lock (ns, table, or regions)
A hbase-server/src/main/java/org/apache/hadoop/hbase/client/locking/LockServiceClient.java
Client that can use the new internal locking service.
Which includes
HBASE-16742 Add chapter for devs on how we do protobufs going forward
HBASE-16741 Amend the generate protobufs out-of-band build step
to include shade, pulling in protobuf source and a hook for patching protobuf
Removed ByteStringer from hbase-protocol-shaded. Use the protobuf-3.1.0
trick directly instead. Makes stuff cleaner. All under 'shaded' dir is
now generated.
HBASE-16567 Upgrade to protobuf-3.1.x
Regenerate all protos in this module with protoc3.
Redo ByteStringer to use new pb3.1.0 unsafebytesutil
instead of HBaseZeroCopyByteString
HBASE-16264 Figure how to deal with endpoints and shaded pb Shade our protobufs.
Do it in a manner that makes it so we can still have in our API references to
com.google.protobuf (and in REST). The c.g.p in API is for Coprocessor Endpoints (CPEP)
This patch is Tactic #4 from Shading Doc attached to the referenced issue.
Figuring an appoach took a while because we have Coprocessor Endpoints
mixed in with the core of HBase that are tough to untangle (FIX).
Tactic #4 (the fourth attempt at addressing this issue) is COPY all but
the CPEP .proto files currently in hbase-protocol to a new module named
hbase-protocol-shaded. Generate .protos again in the new location and
then relocate/shade the generated files. Let CPEPs keep on with the
old references at com.google.protobuf.* and
org.apache.hadoop.hbase.protobuf.* but change the hbase core so all
instead refer to the relocated files in their new location at
org.apache.hadoop.hbase.shaded.com.google.protobuf.*.
Let the new module also shade protobufs themselves and change hbase
core to pick up this shaded protobuf rather than directly reference
com.google.protobuf.
This approach allows us to explicitly refer to either the shaded or
non-shaded version of a protobuf class in any particular context (though
usually context dictates one or the other). Core runs on shaded protobuf.
CPEPs continue to use whatever is on the classpath with
com.google.protobuf.* which is pb2.5.0 for the near future at least.
See above cited doc for follow-ons and downsides. In short, IDEs will complain
about not being able to find the shaded protobufs since shading happens at package
time; will fix by checking in all generated classes and relocated protobuf in
a follow-on. Also, CPEPs currently suffer an extra-copy as marshalled from
non-shaded to shaded. To fix. Finally, our .protos are duplicated; once
shaded, and once not. Pain, but how else to reveal our protos to CPEPs or
C++ client that wants to talk with HBase AND shade protobuf.
Details:
Add a new hbase-protocol-shaded module. It is a copy of hbase-protocol
i with all relocated offset from o.a.h.h. to o.a.h.h.shaded. The new module
also includes the relocated pb. It does not include CPEPs. They stay in
their old location.
Add another module hbase-endpoint which has in it all the endpoints
that ship as part of hbase -- at least the ones that are not
entangled with core such as AccessControl and Auth. Move all protos
for these CPEPs here as well as their unit tests (mostly moving a
bunch of stuff out of hbase-server module)
Much of the change looks like this:
-import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
-import org.apache.hadoop.hbase.protobuf.generated.ClusterIdProtos;
+import org.apache.hadoop.hbase.protobuf.shaded.ProtobufUtil;
+import org.apache.hadoop.hbase.shaded.protobuf.generated.ClusterIdProtos;
In HTable and in HBaseAdmin, regularize the way Callables are used and also hide
protobuf usage as much as possible moving it up into Callable super classes or out
to utility classes. Still TODO is adding in of retries, etc., but can wait on
procedure which will redo all this.
Also in HTable and HBaseAdmin as well as in HRegionServer and Server, be explicit
when using non-shaded protobuf. Do the full-path so it is clear. This is around
endpoint coprocessors registration of services and execution of CPEP methods.
Shrunk ProtobufUtil by moving methods used by one CPEP only back to the CPEP either
into Client class or as new Util class; e.g. AccessControlUtil.
There are actually two versions of ProtobufUtil now; a shaded one and a subset
that is used by CPEPs doing non-shaded work.
Made it so hbase-common no longer depends on hbase-protocol (with Matteo's help)
R*Converter classes got moved down under shaded package -- they are for internal
use only. There are no non-shaded versions of these classes.
D hbase-client/src/main/java/org/apache/hadoop/hbase/client/AbstractRegionServerCallable
D RetryingCallableBase
Not used anymore and we have too many tiers of Callables so removed/cleaned-up.
A ClientServicecallable
Had to add this one. RegionServerCallable was made generic so it could be used
for a few Interfaces (Client and Admin). Then added ClientServiceCallable to
implement RegionServerCallable with the Client Interface.
Tool to test performance of locks and queues in procedure scheduler independently from other framework components.
Inserts table and region operations in the scheduler, then polls them and exercises their locks. Number of tables, regions and operations can be set using cli args.
Change-Id: I0fb27e67d3fcab70dd5d0b5197396b117b11eac6
Michael Stack
Umesh Agashe
Balazs Meszaros
Jan Hentschel
Andrew Purtell
Apekshit Sharma
Zach York
Michael Stack
Matteo Bertozzi
Stephen Yuan Jiang
Hiroshi Ikeda
anoopsamjohn
Jonathan M Hsieh
tedyu