Hi Andrey, Thank you very much for the prompt response. We have only one node in a JVM.
This is my grid config. We use 1.9.0 Ignite. IgniteConfiguration cfg = new IgniteConfiguration(); cfg.setPeerClassLoadingEnabled(false); cfg.setLifecycleBeans(new LogLifecycleBean()); TcpDiscoverySpi discoverySpi = new TcpDiscoverySpi(); TcpDiscoveryVmIpFinder ipFinder = new TcpDiscoveryVmIpFinder(); Collection<String> addressSet = new HashSet<>(); for (String address : ipList) { addressSet.add(address); } ipFinder.setAddresses(addressSet); discoverySpi.setJoinTimeout(10000); discoverySpi.setLocalPort(47500); discoverySpi.setIpFinder(ipFinder); cfg.setDiscoverySpi(discoverySpi); And this is the cache config. We don’t set cache group specifically. CacheConfiguration<String, String> cc = new CacheConfiguration(); cc.setName("mycache"); cc.setBackups(1); cc.setCacheMode(CacheMode.PARTITIONED); cc.setAtomicityMode(CacheAtomicityMode.ATOMIC); LruEvictionPolicy evpl = new LruEvictionPolicy(); evpl.setMaxSize(10000); cc.setEvictionPolicy(evpl); cc.setExpiryPolicyFactory(CreatedExpiryPolicy.factoryOf( new Duration(TimeUnit.SECONDS, 15))); cc.setStatisticsEnabled(true); From: Andrey Mashenkov [mailto:andrey.mashen...@gmail.com] Sent: Friday, June 08, 2018 10:02 AM To: user@ignite.apache.org Subject: Re: Error while Starting Grid: javax.management.InstanceAlreadyExistsException: (LruEvictionPolicy) Hi, Looks like a bug. Can you share grid configuration? Do you have more than one node in same JVM? Do you have configure cache groups manually? On Fri, Jun 8, 2018 at 4:48 PM, HEWA WIDANA GAMAGE, SUBASH <subash.hewawidanagam...@fmr.com<mailto:subash.hewawidanagam...@fmr.com>> wrote: Hi everyone, As a quick note on what we do here, we listen to NODE_FAILED, and NODE_SEGMENTED events and upon such events, we use Ignition.stopAll(true) and Ignition.start() to restart the Ignite grid in a given JVM. Here Ignite does not starts as a standalone process by itself, but bootstrap programmatically since it’s meant to be a part of some other main process. So we received a NODE_FAILED evet and restarted Ignite where we see following error and start fails. And “mycache” is created with LRU eviction policy at Ignite startup process. As per error, it tries to registering an LruEvictionPolicy MBean twice. We use a cache named mycache in PARTITIONED mode with 4 nodes in the cluster. Any idea for this behavior ? org.apache.ignite.IgniteException: Failed to register MBean for component: LruEvictionPolicy [max=100000, batchSize=1, maxMemSize=524288000, memSize=0, size=0] at org.apache.ignite.internal.util.IgniteUtils.convertException(IgniteUtils.java:946) at org.apache.ignite.Ignition.start(Ignition.java:325) at com.test.IgniteRuntime.start(IgniteRuntime.java:87) at com.test.segmentation.SegmentationResolver.recycle(SegmentationResolver.java:61) at com.test.RandomizedDelayResolver.resolve(RandomizedDelayResolver.java:47) at com.test.SegmentationProcessor.lambda$init$2(SegmentationProcessor.java:95) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) Caused by: org.apache.ignite.IgniteCheckedException: Failed to register MBean for component: LruEvictionPolicy [max=100000, batchSize=1, maxMemSize=524288000, memSize=0, size=0] at org.apache.ignite.internal.processors.cache.GridCacheProcessor.registerMbean(GridCacheProcessor.java:3518) at org.apache.ignite.internal.processors.cache.GridCacheProcessor.prepare(GridCacheProcessor.java:557) at org.apache.ignite.internal.processors.cache.GridCacheProcessor.prepare(GridCacheProcessor.java:529) at org.apache.ignite.internal.processors.cache.GridCacheProcessor.createCache(GridCacheProcessor.java:1306) at org.apache.ignite.internal.processors.cache.GridCacheProcessor.onKernalStart(GridCacheProcessor.java:801) at org.apache.ignite.internal.IgniteKernal.start(IgniteKernal.java:959) at org.apache.ignite.internal.IgnitionEx$IgniteNamedInstance.start0(IgnitionEx.java:1799) at org.apache.ignite.internal.IgnitionEx$IgniteNamedInstance.start(IgnitionEx.java:1602) at org.apache.ignite.internal.IgnitionEx.start0(IgnitionEx.java:1042) at org.apache.ignite.internal.IgnitionEx.start(IgnitionEx.java:569) at org.apache.ignite.internal.IgnitionEx.start(IgnitionEx.java:516) at org.apache.ignite.Ignition.start(Ignition.java:322) ... 11 common frames omitted Caused by: javax.management.InstanceAlreadyExistsException: org.apache:clsLdr=764c12b6,group=mycache,name=org.apache.ignite.cache.eviction.lru.LruEvictionPolicy at com.sun.jmx.mbeanserver.Repository.addMBean(Repository.java:437) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerWithRepository(DefaultMBeanServerInterceptor.java:1898) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerDynamicMBean(DefaultMBeanServerInterceptor.java:966) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(DefaultMBeanServerInterceptor.java:900) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:324) at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:522) at org.apache.ignite.internal.util.IgniteUtils.registerCacheMBean(IgniteUtils.java:4523) at org.apache.ignite.internal.processors.cache.GridCacheProcessor.registerMbean(GridCacheProcessor.java:3514) ... 22 common frames omitted -- Best regards, Andrey V. Mashenkov