Whichever wins goes on to run the cluster. All others park themselves in their constructor until master or cluster shutdown or until the active master loses its lease in zookeeper. Thereafter, all running master jostle to take over master role. Cause the server to exit without closing the regions it is serving, the log it is using and without notifying the master. Mark region server s as decommissioned previously called 'draining' to prevent additional regions from getting assigned to them.
This method modifies the master's configuration in order to inject replication-related features. Fetch the configured LoadBalancer class name. Returns the ReplicationPeerManager. Queries the state of the LoadBalancerTracker.
Queries the state of the RegionNormalizerTracker. Queries the state of the SplitOrMergeTracker. List region servers marked as decommissioned previously called 'draining' to not get regions assigned to them. Perform normalization of cluster invoked by RegionNormalizerChore. Remove decommission marker previously called 'draining' from a region server to allow regions assignments.
Registers a new protocol buffer Service subclass as a coprocessor endpoint to be available for handling. Checks whether the table conforms to some sane limits, and configured values compression, etc work. Adds the MasterQuotasObserver to the list of configured Master observers to automatically remove quotas for a table when that table is deleted. If configured to put regions on active master, wait till a backup master becomes active.
Field Detail LOG private static org. Server masterJettyServer jetty server for master to redirect requests to regionserver infoServer. Initializes the HMaster. Description copied from class: HRegionServer. Initialize all ZK based system trackers. Will be overridden in tests. Finish initialization of HMaster after becoming the primary master. The startup order is a bit complicated but very important, do not change it unless you know what you are doing. Initialize file system based components - file system manager, wal manager, table descriptors, etc Publish cluster id Here comes the most complicated part - initialize server manager, assignment manager and region server tracker Create server manager Create procedure executor, load the procedures, but do not start workers.
We will start it later after we finish scheduling SCPs to avoid scheduling duplicated SCPs for the same server Create assignment manager and start it, load the meta region state, but do not load data from meta region Start region server tracker, construct the online servers set and find out dead servers and schedule SCP for them. The online servers will be constructed by scanning zk, and we will also scan the wal directory to find out possible live region servers, and the differences between these two sets are the dead servers If this is a new deploy, schedule a InitMetaProcedure to initialize meta Start necessary service threads - balancer, catalog janior, executor services, and also the procedure executor, etc.
Notice that the balancer must be created first as assignment manager may use it when assigning regions. Wait for meta to be initialized if necesssary, start table state manager. Wait for enough region servers to check-in Let assignment manager load data from meta and construct region states Start all other things such as chore services, etc Notice that now we will not schedule a special procedure to make meta online unless the first time where meta has not been created yet , we will rely on SCP to bring meta online.
Check hbase:meta is up and ready for reading. For use during Master startup only. Check hbase:namespace table is assigned. NS should not hold-up startup. Wait on all threads to finish. Presumption is that all closes and stops have already been called. It first sleep to the next balance plan start time. Meanwhile, throttling by the max number regions in transition to protect availability.
Switch for the background CatalogJanitor thread. Used for testing. The thread will continue to run. It will just be a noop if disabled. Description copied from interface: MasterServices. Throws an exception if something is wrong. The set of loaded coprocessors is stored in a static set. Since it's statically allocated, it does not require that HMaster's cpHost be initialized prior to accessing it. Called when a new RegionServer is added to the cluster.
Checks if new server has a newer version than any existing server and will move system tables there if so. Description copied from interface: Server. Shutdown the cluster. Master runs a coordinated stop of all RegionServers and then itself. Description copied from interface: Stoppable. Stop this service. Implementers should favor logging errors over throwing RuntimeExceptions. Report whether this master is currently the active master or not.
If not active master, we are parked on ZK waiting to become active. Sheen has stated in an interview that he does not know what the real Bill Masters was like and he was doing his own interpretation in his portrayal of him. From Wikipedia, the free encyclopedia.
American gynecologist. For other people named William Masters, see William Masters disambiguation. Cleveland, Ohio , U. Tucson, Arizona , U. Main article: Masters and Johnson. This section needs expansion. You can help by adding to it. January Length pages. New York Times. Retrieved William H. Masters, who with his co-researcher, Virginia E. Johnson, revolutionized the way sex is studied, taught and enjoyed in America, died Friday at a hospice in Tucson. He was 85 and had lived in retirement since , first in St.
Louis and then in Tucson. Sexual revolution. Virginia Miller Test Obergefell v. One Book Called Ulysses. Masters of Sex. Authority control. Categories : births deaths American Episcopalians American relationships and sexuality writers American male non-fiction writers Neurological disease deaths in Arizona Deaths from Parkinson's disease American gynecologists Hamilton College New York alumni Physicians from Cleveland People from St. Louis faculty Writers from Missouri Writers from Cleveland.
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|Lenovo thinkpad t61 fingerprint reader software||Queries the state of the SplitOrMergeTracker. Checks if new server has a newer version than any existing server and will move system tables there if so. Notice that the balancer must be created first as assignment manager may use it when assigning regions. Initializes the HMaster. Used for testing. Report whether this master has completed with its initialization and is ready. Authority control.|
|From good to great to unstoppable||Main article: Masters and Johnson. If switchType is illegal, false will return. An HBase cluster has one active master. Object cloneequalsfinalizegetClasshashCodenotifynotifyAllwaitwaitwait Methods inherited from interface org. If ready, the master is also the active master.|
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