public class ZKConfigurationStore extends YarnConfigurationStore
YarnConfigurationStore.YarnConfigurationStore.LogMutation| Modifier and Type | Field and Description |
|---|---|
protected static org.apache.hadoop.yarn.server.records.Version |
CURRENT_VERSION_INFO |
static org.slf4j.Logger |
LOG |
| Constructor and Description |
|---|
ZKConfigurationStore() |
| Modifier and Type | Method and Description |
|---|---|
void |
close()
Closes the configuration store, releasing any required resources.
|
void |
confirmMutation(YarnConfigurationStore.LogMutation pendingMutation,
boolean isValid)
Should be called after
logMutation. |
void |
format()
Format the persisted configuration.
|
long |
getConfigVersion()
Get the last updated config version.
|
List<YarnConfigurationStore.LogMutation> |
getConfirmedConfHistory(long fromId)
Get a list of confirmed configuration mutations starting from a given id.
|
org.apache.hadoop.yarn.server.records.Version |
getConfStoreVersion()
Get schema version of persisted conf store, for detecting compatibility
issues when changing conf store schema.
|
org.apache.hadoop.yarn.server.records.Version |
getCurrentVersion()
Get the hard-coded schema version, for comparison against the schema
version currently persisted.
|
protected LinkedList<YarnConfigurationStore.LogMutation> |
getLogs()
Get a list of configuration mutations.
|
protected byte[] |
getZkData(String path) |
void |
initialize(org.apache.hadoop.conf.Configuration config,
org.apache.hadoop.conf.Configuration schedConf,
RMContext rmContext)
Initialize the configuration store, with schedConf as the initial
scheduler configuration.
|
void |
logMutation(YarnConfigurationStore.LogMutation logMutation)
Logs the configuration change to backing store.
|
org.apache.hadoop.conf.Configuration |
retrieve()
Retrieve the persisted configuration.
|
protected void |
safeCreateZkData(String path,
byte[] data) |
protected void |
setZkData(String path,
byte[] data) |
void |
storeVersion()
Persist the hard-coded schema version to the conf store.
|
checkVersionpublic static final org.slf4j.Logger LOG
protected static final org.apache.hadoop.yarn.server.records.Version CURRENT_VERSION_INFO
public void initialize(org.apache.hadoop.conf.Configuration config,
org.apache.hadoop.conf.Configuration schedConf,
RMContext rmContext)
throws Exception
YarnConfigurationStoreinitialize in class YarnConfigurationStoreconfig - configuration to initialize store withschedConf - Initial key-value scheduler configuration to persist.rmContext - RMContext for this configuration storeIOException - if initialization failsExceptionprotected LinkedList<YarnConfigurationStore.LogMutation> getLogs() throws Exception
YarnConfigurationStoregetLogs in class YarnConfigurationStoreException - On mutation fetch failurepublic org.apache.hadoop.yarn.server.records.Version getCurrentVersion()
YarnConfigurationStoregetCurrentVersion in class YarnConfigurationStorepublic org.apache.hadoop.yarn.server.records.Version getConfStoreVersion()
throws Exception
YarnConfigurationStoregetConfStoreVersion in class YarnConfigurationStoreException - On version fetch failurepublic void format()
throws Exception
YarnConfigurationStoreformat in class YarnConfigurationStoreIOException - on failure to formatExceptionpublic void storeVersion()
throws Exception
YarnConfigurationStorestoreVersion in class YarnConfigurationStoreException - On storage failurepublic void logMutation(YarnConfigurationStore.LogMutation logMutation) throws Exception
YarnConfigurationStorelogMutation in class YarnConfigurationStorelogMutation - configuration change to be persisted in write ahead logIOException - if logging failsExceptionpublic void confirmMutation(YarnConfigurationStore.LogMutation pendingMutation, boolean isValid) throws Exception
YarnConfigurationStorelogMutation. Gets the pending mutation
last logged by logMutation and marks the mutation as persisted (no
longer pending). If isValid is true, merge the mutation with the persisted
configuration.confirmMutation in class YarnConfigurationStorependingMutation - the log mutation to applyisValid - if true, update persisted configuration with pending
mutation.Exception - if mutation confirmation failspublic org.apache.hadoop.conf.Configuration retrieve()
YarnConfigurationStoreretrieve in class YarnConfigurationStorepublic long getConfigVersion()
throws Exception
YarnConfigurationStoregetConfigVersion in class YarnConfigurationStoreExceptionpublic List<YarnConfigurationStore.LogMutation> getConfirmedConfHistory(long fromId)
YarnConfigurationStoregetConfirmedConfHistory in class YarnConfigurationStorefromId - id from which to start getting mutations, inclusiveprotected void safeCreateZkData(String path, byte[] data) throws Exception
Exceptionpublic void close()
throws IOException
YarnConfigurationStoreclose in class YarnConfigurationStoreIOException - on failure to closeCopyright © 2008–2023 Apache Software Foundation. All rights reserved.