Creating and establishing new connections require a fair amount of overhead and added latency. OkHttp will make every effort to reuse existing connections to avoid this overhead and added latency.

Every OkHttpClient uses a connection pool. Its job is to maintain a reference to all open connections. When an HTTP request is started, OkHttp will attempt to reuse an existing connection from the pool. If there are no existing connections, a new one is created and put into the connection pool. For...

 *
 * <p>{@code contains(x)}, {@code add(x)} and {@code remove(x)}, are all (expected and amortized)
 * constant time operations. Expected in the hashtable sense (depends on the hash function doing a
 * good job of distributing the elements to the buckets to a distribution not far from uniform), and
 * amortized since some operations can trigger a hash table resize.
 *

 *
 * <p>{@code contains(x)}, {@code add(x)} and {@code remove(x)}, are all (expected and amortized)
 * constant time operations. Expected in the hashtable sense (depends on the hash function doing a
 * good job of distributing the elements to the buckets to a distribution not far from uniform), and
 * amortized since some operations can trigger a hash table resize.
 *

Spark/Hadoop workloads which use Hadoop MR Committer v1/v2 algorithm upload objects to a temporary prefix in a bucket. These objects are 'renamed' to a different prefix on Job commit. Object storage admins are forced to configure separate ILM policies to expire these objects and their versions to reclaim space.

### Solution

 *
 * <p>{@code containsKey(k)}, {@code put(k, v)} and {@code remove(k)} are all (expected and
 * amortized) constant time operations. Expected in the hashtable sense (depends on the hash
 * function doing a good job of distributing the elements to the buckets to a distribution not far
 * from uniform), and amortized since some operations can trigger a hash table resize.
 *

- Fixed a bug where Job status updates fail after resuming a Job that was previously started and suspended.
  The error message was: `status.startTime: Required value: startTime cannot be removed for unsuspended job`. ([#134769](https://github.com/kubernetes/kubernetes/pull/134769), [@dejanzele](https://github.com/dejanzele)) [SIG Apps and Testing]

        """.trimIndent()

    setArtifactRules(artifactRuleOverride ?: defaultArtifactRules)
    paramsForBuildToolBuild(buildJvm, os, arch)
    params {
        // The promotion job doesn't have a branch, so %teamcity.build.branch% doesn't work.
        param("env.BUILD_BRANCH", "%teamcity.build.branch%")
    }

    vcs {
        root(AbsoluteId(VersionedSettingsBranch.fromDslContext().vcsRootId()))

### API Change

- Added field .status.uncountedTerminatedPods to the Job resource. This field is used by the job controller to keep track of finished pods before adding them to the Job status counters.
  
  Pods created by the job controller get the finalizer batch.kubernetes.io/job-tracking
  

- Fixed JobTrackingWithFinalizers when a pod succeeds after the job is considered failed, which led to API conflicts that blocked finishing the job. ([#111646](https://github.com/kubernetes/kubernetes/pull/111646), [@alculquicondor](https://github.com/alculquicondor))
- Fixed `JobTrackingWithFinalizers` that:
  - was declaring a job finished before counting all the created pods in the status

	for d, dm := range m.ByDisk {
		latestDriveStats[d] = dm.IOStats
	}
	lastDriveStatsRefresh = time.Now().UTC()
	latestDriveStatsMu.Unlock()
}

// startResourceMetricsCollection - starts the job for collecting resource metrics
func startResourceMetricsCollection() {
	initLatestValues()

	resourceMetricsMapMu.Lock()
	resourceMetricsMap = map[MetricSubsystem]ResourceMetrics{}
	resourceMetricsMapMu.Unlock()