Installing all from Central in JBT 4.18.0.Final introduces errors in error log: java.lang.IllegalStateException: Connection pool shut down

ENTRY org.eclipse.equinox.p2.core 4 0 2021-01-15 16:26:51.840 !MESSAGE Provisioning exception !STACK 1 org.eclipse.equinox.p2.core.ProvisionException: Unable to read repository at http://download.eclipse.org/technology/m2e/releases/1.6/compositeContent.xml. at org.eclipse.equinox.internal.p2.repository.CacheManager.updateCache(CacheManager.java:430) at org.eclipse.equinox.internal.p2.repository.CacheManager.createCache(CacheManager.java:263) at org.eclipse.equinox.internal.p2.metadata.repository.CompositeMetadataRepositoryFactory.getLocalFile(CompositeMetadataRepositoryFactory.java:77) at org.eclipse.equinox.internal.p2.metadata.repository.CompositeMetadataRepositoryFactory.load(CompositeMetadataRepositoryFactory.java:100) at org.eclipse.equinox.internal.p2.metadata.repository.MetadataRepositoryManager.factoryLoad(MetadataRepositoryManager.java:63) at org.eclipse.equinox.internal.p2.repository.helpers.AbstractRepositoryManager.loadRepository(AbstractRepositoryManager.java:775) at org.eclipse.equinox.internal.p2.repository.helpers.AbstractRepositoryManager.loadRepository(AbstractRepositoryManager.java:676) at org.eclipse.equinox.internal.p2.metadata.repository.MetadataRepositoryManager.loadRepository(MetadataRepositoryManager.java:110) at org.eclipse.equinox.internal.p2.metadata.repository.MetadataRepositoryManager.loadRepository(MetadataRepositoryManager.java:105) at org.eclipse.equinox.internal.p2.metadata.repository.CompositeMetadataRepository.addChild(CompositeMetadataRepository.java:171) at org.eclipse.equinox.internal.p2.metadata.repository.CompositeMetadataRepository.<init>(CompositeMetadataRepository.java:113) at org.eclipse.equinox.internal.p2.metadata.repository.CompositeMetadataRepositoryFactory.load(CompositeMetadataRepositoryFactory.java:124) at org.eclipse.equinox.internal.p2.metadata.repository.MetadataRepositoryManager.factoryLoad(MetadataRepositoryManager.java:63) at org.eclipse.equinox.internal.p2.repository.helpers.AbstractRepositoryManager.loadRepository(AbstractRepositoryManager.java:775) at org.eclipse.equinox.internal.p2.repository.helpers.AbstractRepositoryManager.loadRepository(AbstractRepositoryManager.java:676) at org.eclipse.equinox.internal.p2.repository.helpers.AbstractRepositoryManager.query(AbstractRepositoryManager.java:1167) at org.zeroturnaround.eclipse.update.EclipsePluginLatestVersionProvider.hasRequirements(EclipsePluginLatestVersionProvider.java:86) at org.zeroturnaround.eclipse.update.EclipsePluginLatestVersionProvider.getLatestVersionInternal(EclipsePluginLatestVersionProvider.java:76) at org.zeroturnaround.eclipse.update.EclipsePluginLatestVersionProvider.getLatestVersionOnline(EclipsePluginLatestVersionProvider.java:50) at org.zeroturnaround.eclipse.update.EclipsePluginLatestVersionProvider.getLatestVersion(EclipsePluginLatestVersionProvider.java:42) at org.zeroturnaround.jrebel.client.update.PluginLatestVersion.findLatestVersion(PluginLatestVersion.java:24) at org.zeroturnaround.jrebel.ide.common.utils.update.JRebelPluginUpdate.getUpdateSiteVersion(JRebelPluginUpdate.java:159) at org.zeroturnaround.jrebel.ide.common.utils.update.JRebelPluginUpdate.checkForNewVersion(JRebelPluginUpdate.java:51) at org.zeroturnaround.jrebel.ide.common.utils.update.JRebelPluginUpdate.startNewVersionCheck(JRebelPluginUpdate.java:39) at org.zeroturnaround.jrebel.ide.common.CommonStartup.lambda$startNewVersionCheck$4(CommonStartup.java:310) at org.zeroturnaround.jrebel.ide.common.CommonStartup$$Lambda$10.run(CommonStartup.java) at org.zeroturnaround.common.util.ExecutorUtil$RunnableWrapper.run(ExecutorUtil.java:161) at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) at java.base/java.lang.Thread.run(Thread.java:834) Caused by: java.lang.IllegalStateException: Connection pool shut down at org.apache.http.util.Asserts.check(Asserts.java:34) at org.apache.http.pool.AbstractConnPool.lease(AbstractConnPool.java:196) at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.requestConnection(PoolingHttpClientConnectionManager.java:268) at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:176) at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:186) at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89) at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110) at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185) at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83) at org.eclipse.ecf.provider.filetransfer.httpclient45.HttpClientRetrieveFileTransfer.performConnect(HttpClientRetrieveFileTransfer.java:1003) at org.eclipse.ecf.provider.filetransfer.httpclient45.HttpClientRetrieveFileTransfer.access$0(HttpClientRetrieveFileTransfer.java:995) at org.eclipse.ecf.provider.filetransfer.httpclient45.HttpClientRetrieveFileTransfer$1.performFileTransfer(HttpClientRetrieveFileTransfer.java:991) at org.eclipse.ecf.filetransfer.FileTransferJob.run(FileTransferJob.java:76) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) !SUBENTRY 1 org.eclipse.equinox.p2.transport.ecf 4 1002 2021-01-15 16:26:51.846 !MESSAGE Unable to read repository at http://download.eclipse.org/technology/m2e/releases/1.6/compositeContent.xml. !STACK 0 java.lang.IllegalStateException: Connection pool shut down at org.apache.http.util.Asserts.check(Asserts.java:34) at org.apache.http.pool.AbstractConnPool.lease(AbstractConnPool.java:196) at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.requestConnection(PoolingHttpClientConnectionManager.java:268) at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:176) at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:186) at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89) at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110) at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185) at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83) at org.eclipse.ecf.provider.filetransfer.httpclient45.HttpClientRetrieveFileTransfer.performConnect(HttpClientRetrieveFileTransfer.java:1003) at org.eclipse.ecf.provider.filetransfer.httpclient45.HttpClientRetrieveFileTransfer.access$0(HttpClientRetrieveFileTransfer.java:995) at org.eclipse.ecf.provider.filetransfer.httpclient45.HttpClientRetrieveFileTransfer$1.performFileTransfer(HttpClientRetrieveFileTransfer.java:991) at org.eclipse.ecf.filetransfer.FileTransferJob.run(FileTransferJob.java:76) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) !ENTRY org.eclipse.equinox.p2.metadata.repository 4 0 2021-01-15 16:26:51.847 !MESSAGE Unexpected error loading extension: org.eclipse.equinox.p2.metadata.repository.compositeRepository !STACK 0 java.lang.NullPointerException at org.eclipse.equinox.internal.p2.repository.helpers.AbstractRepositoryManager.handleRemoteIndexFile(AbstractRepositoryManager.java:729) at org.eclipse.equinox.internal.p2.repository.helpers.AbstractRepositoryManager.loadIndexFile(AbstractRepositoryManager.java:723) at org.eclipse.equinox.internal.p2.repository.helpers.AbstractRepositoryManager.loadRepository(AbstractRepositoryManager.java:665) at org.eclipse.equinox.internal.p2.metadata.repository.MetadataRepositoryManager.loadRepository(MetadataRepositoryManager.java:110) at org.eclipse.equinox.internal.p2.metadata.repository.MetadataRepositoryManager.loadRepository(MetadataRepositoryManager.java:105) at org.eclipse.equinox.internal.p2.metadata.repository.CompositeMetadataRepository.addChild(CompositeMetadataRepository.java:171) at org.eclipse.equinox.internal.p2.metadata.repository.CompositeMetadataRepository.<init>(CompositeMetadataRepository.java:113) at org.eclipse.equinox.internal.p2.metadata.repository.CompositeMetadataRepositoryFactory.load(CompositeMetadataRepositoryFactory.java:124) at org.eclipse.equinox.internal.p2.metadata.repository.MetadataRepositoryManager.factoryLoad(MetadataRepositoryManager.java:63) at org.eclipse.equinox.internal.p2.repository.helpers.AbstractRepositoryManager.loadRepository(AbstractRepositoryManager.java:775) at org.eclipse.equinox.internal.p2.repository.helpers.AbstractRepositoryManager.loadRepository(AbstractRepositoryManager.java:676) at org.eclipse.equinox.internal.p2.repository.helpers.AbstractRepositoryManager.query(AbstractRepositoryManager.java:1167) at org.zeroturnaround.eclipse.update.EclipsePluginLatestVersionProvider.hasRequirements(EclipsePluginLatestVersionProvider.java:86) at org.zeroturnaround.eclipse.update.EclipsePluginLatestVersionProvider.getLatestVersionInternal(EclipsePluginLatestVersionProvider.java:76) at org.zeroturnaround.eclipse.update.EclipsePluginLatestVersionProvider.getLatestVersionOnline(EclipsePluginLatestVersionProvider.java:50) at org.zeroturnaround.eclipse.update.EclipsePluginLatestVersionProvider.getLatestVersion(EclipsePluginLatestVersionProvider.java:42) at org.zeroturnaround.jrebel.client.update.PluginLatestVersion.findLatestVersion(PluginLatestVersion.java:24) at org.zeroturnaround.jrebel.ide.common.utils.update.JRebelPluginUpdate.getUpdateSiteVersion(JRebelPluginUpdate.java:159) at org.zeroturnaround.jrebel.ide.common.utils.update.JRebelPluginUpdate.checkForNewVersion(JRebelPluginUpdate.java:51) at org.zeroturnaround.jrebel.ide.common.utils.update.JRebelPluginUpdate.startNewVersionCheck(JRebelPluginUpdate.java:39) at org.zeroturnaround.jrebel.ide.common.CommonStartup.lambda$startNewVersionCheck$4(CommonStartup.java:310) at org.zeroturnaround.jrebel.ide.common.CommonStartup$$Lambda$10.run(CommonStartup.java) at org.zeroturnaround.common.util.ExecutorUtil$RunnableWrapper.run(ExecutorUtil.java:161) at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) at java.base/java.lang.Thread.run(Thread.java:834)