pre-Go 1.24 behavior.

### Go 1.23

Go 1.23 changed the channels created by package time to be unbuffered
(synchronous), which makes correct use of the [`Timer.Stop`](/pkg/time/#Timer.Stop)
and [`Timer.Reset`](/pkg/time/#Timer.Reset) method results much easier.
The [`asynctimerchan` setting](/pkg/time/#NewTimer) disables this change.
There are no runtime metrics for this change,

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.app.job;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.codelibs.core.timer.TimeoutTask;
import org.codelibs.fess.Constants;
import org.codelibs.fess.es.config.exentity.JobLog;
import org.codelibs.fess.es.config.exentity.ScheduledJob;
import org.codelibs.fess.exception.ScheduledJobException;

import org.codelibs.core.io.CloseableUtil;
import org.codelibs.core.io.FileUtil;
import org.codelibs.core.io.InputStreamUtil;
import org.codelibs.core.lang.StringUtil;
import org.codelibs.core.timer.TimeoutManager;
import org.codelibs.core.timer.TimeoutTask;
import org.codelibs.fess.crawler.Constants;
import org.codelibs.fess.crawler.builder.RequestDataBuilder;
import org.codelibs.fess.crawler.client.AbstractCrawlerClient;

import java.util.Map;

import org.apache.commons.lang3.RandomStringUtils;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.codelibs.core.lang.StringUtil;
import org.codelibs.core.timer.TimeoutTask;
import org.codelibs.fess.Constants;
import org.codelibs.fess.exception.JobProcessingException;
import org.codelibs.fess.helper.ProcessHelper;
import org.codelibs.fess.mylasta.direction.FessConfig;

		// time.
		r := rand.New(rand.NewSource(time.Now().UnixNano()))
		randSleepFor := func() time.Duration {
			return 5*time.Second + time.Duration(float64(5*time.Second)*r.Float64())
		}

		timer := time.NewTimer(randSleepFor())
		defer timer.Stop()

		var (
			quit     bool
			traceMsg string
		)

		for {
			select {
			case rebalErr := <-doneCh:
				quit = true
				now := time.Now()

			return false
		case <-callhomeTimer.C:
			if !globalCallhomeConfig.Enabled() {
				// Stop the processing as callhome got disabled
				return false
			}

			performCallhome(ctx)

			// Reset the timer for next cycle.
			callhomeTimer.Reset(globalCallhomeConfig.FrequencyDur())
		}
	}
}

func performCallhome(ctx context.Context) {
	deadline := 10 * time.Second // Default deadline is 10secs for callhome

islands","somalia","south africa","south georgia and the south sandwich islands","south sudan","spain","sri lanka","sudan","suriname","svalbard and jan mayen","swaziland","sweden","switzerland","syria","taiwan","tajikistan","tanzania","thailand","timor-leste","togo","tokelau","tonga","trinidad and tobago","tunisia","turkey","turkmenistan","turks and caicos islands","tuvalu","uganda","ukraine","united arab emirates","united kingdom","united states minor outlying islands","united states","uruguay"...

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.timer;

import java.io.ByteArrayOutputStream;
import java.io.OutputStream;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

import org.apache.commons.text.StringEscapeUtils;

import org.codelibs.core.io.CloseableUtil;
import org.codelibs.core.io.CopyUtil;
import org.codelibs.core.io.FileUtil;
import org.codelibs.core.io.InputStreamUtil;
import org.codelibs.core.timer.TimeoutManager;
import org.codelibs.core.timer.TimeoutTask;
import org.codelibs.fess.crawler.Constants;
import org.codelibs.fess.crawler.builder.RequestDataBuilder;
import org.codelibs.fess.crawler.client.AbstractCrawlerClient;

rfors","storuman","strängnäs","strömstad","strömsund","sundbyberg","sundsvall","sunne","surahammar","svalöv","svedala","svenljunga","säffle","säter","sävsjö","söderhamns","söderköping","södertälje","sölvesborg","tanum","tibro","tidaholm","tierp","timrå","tingsryd","tjörn","tomelilla","torsby","torså","tranemo","tranå","trelleborg","trollhättan","trosa","tyresö","täby","töreboda","uddevalla","ulricehamns","umeå","upplands väsby","upplands-bro","uppsala","uppvidinge","vadstena","vaggeryd","valdema...