Read timed out Error while starting Engines

Question

Hello All, 
 We are trying to start Appian engines in 18.2 version but we are unable to start and getting the below error: 
 Starting Distributed Transaction Log Zookeeper connected, root child count of [9] QuorumPeerMain is already a running process Service Zookeeper successfully started local Kafka broker is not registered in Zookeeper Executing command: '[/usr/local/appian/services/kafka_2.11-0.10.1.1-appian-3/bin/kafka-server-start.sh, /usr/local/appian/services/conf/kafka-server.properties, --override, log.dirs=/usr/local/appian/services/data/kafka-logs, --override, min.insync.replicas=1, --override, listeners=PLAINTEXT://localhost:9092, --override, zookeeper.connect=localhost:2181, --override, advertised.host.name=localhost, --override, advertised.port=9092, --override, broker.id=0, --override, zookeeper.connection.timeout.ms=40000, --override, zookeeper.session.timeout.ms=40000]' in /usr/local/appian/services/kafka_2.11-0.10.1.1-appian-3/bin with environment [KAFKA_HEAP_OPTS:-Xms512m -Xmx1024m, KAFKA_OPTS:-Duser.timezone=GMT, LOG_DIR:/usr/local/appian/logs/service-manager/kafka, CLASSPATH:, KAFKA_LOG4J_OPTS:-Dlog4j.configuration=file:///usr/local/appian/services/conf/kafka-log4j.properties] Starting Kafka... waiting for process Kafka waiting for process Kafka process Kafka not running after 10000 seconds Unable to start service Kafka java.util.concurrent.TimeoutException: Process Kafka did not launch within 10000 ms at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.8.0_181] at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[?:1.8.0_181] at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:1.8.0_181] at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[?:1.8.0_181] at org.codehaus.groovy.reflection.CachedConstructor.invoke(CachedConstructor.java:83) ~[groovy-all-2.4.12.jar:2.4.12] at org.codehaus.groovy.reflection.CachedConstructor.doConstructorInvoke(CachedConstructor.java:77) ~[groovy-all-2.4.12.jar:2.4.12] at org.codehaus.groovy.runtime.callsite.ConstructorSite$ConstructorSiteNoUnwrap.callConstructor(ConstructorSite.java:84) ~[groovy-all-2.4.12.jar:2.4.12] at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallConstructor(CallSiteArray.java:60) ~[groovy-all-2.4.12.jar:2.4.12] at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callConstructor(AbstractCallSite.java:235) ~[groovy-all-2.4.12.jar:2.4.12] at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callConstructor(AbstractCallSite.java:247) ~[groovy-all-2.4.12.jar:2.4.12] at com.appian.komodo.translog.services.DistributedTransactionLogService$Trait$Helper.start(DistributedTransactionLogService.groovy:32) ~[komodo-1.95.8.jar:1.95.8] at com.appian.komodo.translog.services.Kafka.start(Kafka.groovy) ~[komodo-1.95.8.jar:1.95.8] at com.appian.komodo.translog.DistributedTransactionLog$_startService_closure2.doCall(DistributedTransactionLog.groovy:110) ~[komodo-1.95.8.jar:1.95.8] at com.appian.komodo.translog.DistributedTransactionLog$_startService_closure2.call(DistributedTransactionLog.groovy) ~[komodo-1.95.8.jar:1.95.8] at com.appian.komodo.translog.DistributedTransactionLog.retryableLaunch(DistributedTransactionLog.groovy:98) ~[komodo-1.95.8.jar:1.95.8] at com.appian.komodo.translog.DistributedTransactionLog.startService(DistributedTransactionLog.groovy:108) ~[komodo-1.95.8.jar:1.95.8] at com.appian.komodo.translog.DistributedTransactionLog.startTransactionLog(DistributedTransactionLog.groovy:133) ~[komodo-1.95.8.jar:1.95.8] at com.appian.komodo.translog.DistributedTransactionLog.access$0(DistributedTransactionLog.groovy) ~[komodo-1.95.8.jar:1.95.8] at com.appian.komodo.translog.DistributedTransactionLog$_runWithExitCode_closure3.doCall(DistributedTransactionLog.groovy:161) ~[komodo-1.95.8.jar:1.95.8] at com.appian.komodo.translog.DistributedTransactionLog$_runWithExitCode_closure3.call(DistributedTransactionLog.groovy) ~[komodo-1.95.8.jar:1.95.8] at org.codehaus.groovy.runtime.IOGroovyMethods.withCloseable(IOGroovyMethods.java:1622) ~[groovy-all-2.4.12.jar:2.4.12] at com.appian.komodo.translog.DistributedTransactionLog.runWithExitCode(DistributedTransactionLog.groovy:159) ~[komodo-1.95.8.jar:1.95.8] at com.appian.komodo.KomodoScript.executeNoExit(KomodoScript.groovy:117) ~[komodo-1.95.8.jar:1.95.8] at com.appian.komodo.translog.DistributedTransactionLog.start(DistributedTransactionLog.groovy:40) ~[komodo-1.95.8.jar:1.95.8] at com.appian.komodo.translog.DistributedTransactionLog$start.call(Unknown Source) ~[?:?] at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48) ~[groovy-all-2.4.12.jar:2.4.12] at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113) ~[groovy-all-2.4.12.jar:2.4.12] at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:133) ~[groovy-all-2.4.12.jar:2.4.12] at com.appian.komodo.StartKomodo.startDistributedTransactionLog(StartKomodo.groovy:129) ~[komodo-1.95.8.jar:1.95.8] at com.appian.komodo.StartKomodo.run(StartKomodo.groovy:79) ~[komodo-1.95.8.jar:1.95.8] at com.appian.komodo.KomodoScript.runWithExitCode(KomodoScript.groovy:96) ~[komodo-1.95.8.jar:1.95.8] at com.appian.komodo.KomodoScript.executeNoExit(KomodoScript.groovy:117) ~[komodo-1.95.8.jar:1.95.8] at com.appian.komodo.KomodoScript.execute(KomodoScript.groovy:132) ~[komodo-1.95.8.jar:1.95.8] at com.appian.komodo.StartKomodo.main(StartKomodo.groovy:60) ~[komodo-1.95.8.jar:1.95.8] waiting for process Kafka process Kafka shutdown local Kafka broker is not registered in Zookeeper local Kafka broker is not registered in Zookeeper Executing command: '[/usr/local/appian/services/kafka_2.11-0.10.1.1-appian-3/bin/kafka-server-start.sh, /usr/local/appian/services/conf/kafka-server.properties, --override, log.dirs=/usr/local/appian/services/data/kafka-logs, --override, min.insync.replicas=1, --override, listeners=PLAINTEXT://localhost:9092, --override, zookeeper.connect=localhost:2181, --override, advertised.host.name=localhost, --override, advertised.port=9092, --override, broker.id=0, --override, zookeeper.connection.timeout.ms=40000, --override, zookeeper.session.timeout.ms=40000]' in /usr/local/appian/services/kafka_2.11-0.10.1.1-appian-3/bin with environment [KAFKA_HEAP_OPTS:-Xms512m -Xmx1024m, KAFKA_OPTS:-Duser.timezone=GMT, LOG_DIR:/usr/local/appian/logs/service-manager/kafka, CLASSPATH:, KAFKA_LOG4J_OPTS:-Dlog4j.configuration=file:///usr/local/appian/services/conf/kafka-log4j.properties] Starting Kafka... process Kafka running local Kafka broker is not registered in Zookeeper Waiting for local Kafka broker to be registered with Zookeeper local Kafka broker is not registered in Zookeeper Waiting for local Kafka broker to be registered with Zookeeper local Kafka broker is not registered in Zookeeper Waiting for local Kafka broker to be registered with Zookeeper local Kafka broker 0 : (EndPoint(localhost,9092,PLAINTEXT)) : null registered in Zookeeper Local Kafka broker is registered with Zookeeper...checking topics Waiting for the following topics listed in Zookeeper to become available: List(serviceManager.transaction.notifications, serviceManager.transaction.download-stats, serviceManager.transaction.forums, serviceManager.transaction.groups, serviceManager.transaction.notifications-email, serviceManager.transaction.execution01, serviceManager.transaction.channels, serviceManager.transaction.portal, serviceManager.transaction.execution00, serviceManager.transaction.execution02, serviceManager.transaction.content, serviceManager.transaction.process-design, serviceManager.transaction.analytics02, serviceManager.exec.idblocks, __consumer_offsets, serviceManager.transaction.analytics00, serviceManager.transaction.analytics01) Waiting for topic serviceManager.transaction.forums to be available Topic serviceManager.transaction.forums available. Waiting for topic serviceManager.transaction.notifications to be available Topic serviceManager.transaction.notifications available. Waiting for topic serviceManager.transaction.notifications-email to be available Topic serviceManager.transaction.notifications-email available. Waiting for topic serviceManager.transaction.channels to be available Topic serviceManager.transaction.channels available. Waiting for topic serviceManager.transaction.content to be available Topic serviceManager.transaction.content available. Waiting for topic serviceManager.transaction.download-stats to be available Topic serviceManager.transaction.download-stats available. Waiting for topic serviceManager.transaction.groups to be available Topic serviceManager.transaction.groups available. Waiting for topic serviceManager.transaction.portal to be available Topic serviceManager.transaction.portal available. Waiting for topic serviceManager.transaction.process-design to be available Topic serviceManager.transaction.process-design available. Waiting for topic serviceManager.transaction.analytics00 to be available Topic serviceManager.transaction.analytics00 available. Waiting for topic serviceManager.transaction.analytics01 to be available Topic serviceManager.transaction.analytics01 available. Waiting for topic serviceManager.transaction.analytics02 to be available Topic serviceManager.transaction.analytics02 available. Waiting for topic serviceManager.transaction.execution00 to be available Topic serviceManager.transaction.execution00 available. Waiting for topic serviceManager.transaction.execution01 to be available Topic serviceManager.transaction.execution01 available. Waiting for topic serviceManager.transaction.execution02 to be available Topic serviceManager.transaction.execution02 available. All topics accessible...local Kafka broker localhost:9092 successfully launched Kafka started in 21486 ms Service Kafka successfully started Distributed Transaction Log Started Deleting all files not modified in the last 30 days Starting Service Manager Executing command: '[/usr/local/appian/services/lib/scripts/service-manager.sh]' in /usr/local/appian/services/lib/scripts with environment [JAVA_OPTS:-XX:MaxDirectMemorySize=8g -Xms64m -Xmx8g] Waiting for Service Manager to launch Service Manager started in 83345 ms Starting forums forums: Start initiated Starting notifications notifications: Start initiated Starting notifications-email notifications-email: Start initiated Starting channels channels: Start initiated Starting content content: Start initiated Starting download-stats Error running script: Read timed out java.net.SocketTimeoutException: Read timed out at java.net.SocketInputStream.socketRead0(Native Method) at java.net.SocketInputStream.socketRead(SocketInputStream.java:116) at java.net.SocketInputStream.read(SocketInputStream.java:171) at java.net.SocketInputStream.read(SocketInputStream.java:141) at org.apache.http.impl.io.SessionInputBufferImpl.streamRead(SessionInputBufferImpl.java:139) at org.apache.http.impl.io.SessionInputBufferImpl.fillBuffer(SessionInputBufferImpl.java:155) at org.apache.http.impl.io.SessionInputBufferImpl.readLine(SessionInputBufferImpl.java:284) at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:140) at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:57) at org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:261) at org.apache.http.impl.DefaultBHttpClientConnection.receiveResponseHeader(DefaultBHttpClientConnection.java:165) at org.apache.http.impl.conn.CPoolProxy.receiveResponseHeader(CPoolProxy.java:167) at org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.java:272) at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:124) at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:271) at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:184) at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110) at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184) at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82) at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:107) at com.appian.komodo.cluster.client.ClusterRestClient.sendPost(ClusterRestClient.java:256) at com.appian.komodo.cluster.client.ClusterRestClient.doPost(ClusterRestClient.java:231) at com.appian.komodo.KomodoScriptRestClient.post(KomodoScriptRestClient.groovy:104) at com.appian.komodo.KomodoScriptRestClient.post(KomodoScriptRestClient.groovy) at com.appian.komodo.KomodoScriptRestClient.postEngineStart(KomodoScriptRestClient.groovy:262) at com.appian.komodo.KomodoScriptRestClient.postEngineStart(KomodoScriptRestClient.groovy:267) at com.appian.komodo.StartKomodo$_startEnginesAndWait_closure2.doCall(StartKomodo.groovy:179) at com.appian.komodo.StartKomodo$_startEnginesAndWait_closure2.call(StartKomodo.groovy) at org.codehaus.groovy.runtime.DefaultGroovyMethods.each(DefaultGroovyMethods.java:2040) at org.codehaus.groovy.runtime.DefaultGroovyMethods.each(DefaultGroovyMethods.java:2025) at org.codehaus.groovy.runtime.DefaultGroovyMethods.each(DefaultGroovyMethods.java:2078) at com.appian.komodo.StartKomodo.startEnginesAndWait(StartKomodo.groovy:178) at com.appian.komodo.StartKomodo.run(StartKomodo.groovy:100) at com.appian.komodo.KomodoScript.runWithExitCode(KomodoScript.groovy:96) at com.appian.komodo.KomodoScript.executeNoExit(KomodoScript.groovy:117) at com.appian.komodo.KomodoScript.execute(KomodoScript.groovy:132) at com.appian.komodo.StartKomodo.main(StartKomodo.groovy:60) 
 We tried clearing cache memory, increasing the Time-out value, installing hotfix for 18.2 and also tried deleting the zookeeper folder in <appian-home>/services/data but still we are not able to start it.