Interesting [ 720.693768] blk_update_request: I/O error, dev nvme0n1, sector 1397303056 [ 750.698840] blk_update_request: I/O error, dev nvme0n1, sector 1397303080 [ 1416.202103] blk_update_request: I/O error, dev nvme0n1, sector 1397303080
On 04/06/2017 05:26 PM, Avi Kivity wrote: > > Is there anything in dmesg? > > > On 04/06/2017 07:25 PM, Cogumelos Maravilha wrote: >> >> Now dies and restart (systemd) without logging why >> >> system.log >> >> INFO [Native-Transport-Requests-2] 2017-04-06 16:06:55,362 >> AuthCache.java:172 - (Re)initializing RolesCache (validity period >> /update interval/max entries) (2000/2000/1000) >> INFO [main] 2017-04-06 16:17:42,535 YamlConfigurationLoader.java:89 >> - Configuration location: file:/etc/cassandra/cassandra. >> yaml >> >> >> debug.log >> DEBUG [GossipStage:1] 2017-04-06 16:16:56,272 >> FailureDetector.java:457 - Ignoring interval time of 2496703934 for >> /10.100.120.52 >> DEBUG [GossipStage:1] 2017-04-06 16:16:59,090 >> FailureDetector.java:457 - Ignoring interval time of 2818071981 for >> /10.100.120.161 >> INFO [main] 2017-04-06 16:17:42,535 YamlConfigurationLoader.java:89 >> - Configuration location: file:/etc/cassandra/cassandra.yaml >> DEBUG [main] 2017-04-06 16:17:42,540 YamlConfigurationLoader.java:108 >> - Loading settings from file:/etc/cassandra/cassandra.yaml >> >> >> On 04/06/2017 04:18 PM, Cogumelos Maravilha wrote: >>> find /mnt/cassandra/ \! -user cassandra >>> nothing >>> >>> I've found some "strange" solutions on Internet >>> chmod -R 2777 /tmp >>> chmod -R 2775 cassandra folder >>> >>> Lets give some time to see the result >>> >>> On 04/06/2017 03:14 PM, Michael Shuler wrote: >>>> All it takes is one frustrated `sudo cassandra` run. Checking only the >>>> top level directory ownership is insufficient, since root could own >>>> files/dirs created below the top level. Find all files not owned by user >>>> cassandra: `find /mnt/cassandra/ \! -user cassandra` >>>> >>>> Just another thought. >>>> >>>> -- Michael On 04/06/2017 05:23 AM, Cogumelos Maravilha wrote: >>>>> From cassandra.yaml: >>>>> >>>>> hints_directory: /mnt/cassandra/hints >>>>> data_file_directories: >>>>> - /mnt/cassandra/data >>>>> commitlog_directory: /mnt/cassandra/commitlog >>>>> saved_caches_directory: /mnt/cassandra/saved_caches >>>>> >>>>> drwxr-xr-x 3 cassandra cassandra 23 Apr 5 16:03 mnt/ >>>>> >>>>> drwxr-xr-x 6 cassandra cassandra 68 Apr 5 16:17 ./ >>>>> drwxr-xr-x 3 cassandra cassandra 23 Apr 5 16:03 ../ >>>>> drwxr-xr-x 2 cassandra cassandra 80 Apr 6 10:07 commitlog/ >>>>> drwxr-xr-x 8 cassandra cassandra 124 Apr 5 16:17 data/ >>>>> drwxr-xr-x 2 cassandra cassandra 72 Apr 5 16:20 hints/ >>>>> drwxr-xr-x 2 cassandra cassandra 49 Apr 5 20:17 saved_caches/ >>>>> >>>>> cassand+ 2267 1 99 10:18 ? 00:02:56 java >>>>> -Xloggc:/var/log/cassandra/gc.log -ea -XX:+UseThreadPriorities >>>>> -XX:Threa... >>>>> >>>>> /dev/mapper/um_vg-xfs_lv 885G 27G 858G 4% /mnt >>>>> >>>>> On /etc/security/limits.conf >>>>> >>>>> * - memlock unlimited >>>>> * - nofile 100000 >>>>> * - nproc 32768 >>>>> * - as unlimited >>>>> >>>>> On /etc/security/limits.d/cassandra.conf >>>>> >>>>> cassandra - memlock unlimited >>>>> cassandra - nofile 100000 >>>>> cassandra - as unlimited >>>>> cassandra - nproc 32768 >>>>> >>>>> On /etc/sysctl.conf >>>>> >>>>> vm.max_map_count = 1048575 >>>>> >>>>> On /etc/systcl.d/cassanda.conf >>>>> >>>>> vm.max_map_count = 1048575 >>>>> net.ipv4.tcp_keepalive_time=600 >>>>> >>>>> On /etc/pam.d/su >>>>> ... >>>>> session required pam_limits.so >>>>> ... >>>>> >>>>> Distro is the currently Ubuntu LTS. >>>>> Thanks >>>>> >>>>> >>>>> On 04/06/2017 10:39 AM, benjamin roth wrote: >>>>>> Cassandra cannot write an SSTable to disk. Are you sure the >>>>>> disk/volume where SSTables reside (normally /var/lib/cassandra/data) >>>>>> is writeable for the CS user and has enough free space? >>>>>> The CDC warning also implies that. >>>>>> The other warnings indicate you are probably not running CS as root >>>>>> and you did not set an appropriate limit for max open files. Running >>>>>> out of open files can also be a reason for the IO error. >>>>>> >>>>>> 2017-04-06 11:34 GMT+02:00 Cogumelos Maravilha >>>>>> <cogumelosmaravi...@sapo.pt <mailto:cogumelosmaravi...@sapo.pt>>: >>>>>> >>>>>> Hi list, >>>>>> >>>>>> I'm using C* 3.10 in a 6 nodes cluster RF=2. All instances type >>>>>> i3.xlarge (AWS) with 32GB, 2 cores and SSD LVM XFS formated 885G. >>>>>> I have >>>>>> one node that is always dieing and I don't understand why. Can anyone >>>>>> give me some hints please. All nodes using the same configuration. >>>>>> >>>>>> Thanks in advance. >>>>>> >>>>>> INFO [IndexSummaryManager:1] 2017-04-06 05:22:18,352 >>>>>> IndexSummaryRedistribution.java:75 - Redistributing index summaries >>>>>> ERROR [MemtablePostFlush:22] 2017-04-06 06:00:26,800 >>>>>> CassandraDaemon.java:229 - Exception in thread >>>>>> Thread[MemtablePostFlush:22,5,main] >>>>>> org.apache.cassandra.io >>>>>> <http://org.apache.cassandra.io>.FSWriteError: >>>>>> java.io.IOException: Input/output >>>>>> error >>>>>> at >>>>>> >>>>>> org.apache.cassandra.io.util.SequentialWriter.syncDataOnlyInternal(SequentialWriter.java:173) >>>>>> ~[apache-cassandra-3.10.jar:3.10] >>>>>> at >>>>>> >>>>>> org.apache.cassandra.io.util.SequentialWriter.syncInternal(SequentialWriter.java:185) >>>>>> ~[apache-cassandra-3.10.jar:3.10] >>>>>> at >>>>>> org.apache.cassandra.io >>>>>> >>>>>> <http://org.apache.cassandra.io>.compress.CompressedSequentialWriter.access$100(CompressedSequentialWriter.java:38) >>>>>> ~[apache-cassandra-3.10.jar:3.10] >>>>>> at >>>>>> org.apache.cassandra.io >>>>>> >>>>>> <http://org.apache.cassandra.io>.compress.CompressedSequentialWriter$TransactionalProxy.doPrepare(CompressedSequentialWriter.java:307) >>>>>> ~[apache-cassandra-3.10.jar:3.10] >>>>>> at >>>>>> >>>>>> org.apache.cassandra.utils.concurrent.Transactional$AbstractTransactional.prepareToCommit(Transactional.java:173) >>>>>> ~[apache-cassandra-3.10.jar:3.10] >>>>>> at >>>>>> >>>>>> org.apache.cassandra.io.util.SequentialWriter.prepareToCommit(SequentialWriter.java:358) >>>>>> ~[apache-cassandra-3.10.jar:3.10] >>>>>> at >>>>>> org.apache.cassandra.io >>>>>> >>>>>> <http://org.apache.cassandra.io>.sstable.format.big.BigTableWriter$TransactionalProxy.doPrepare(BigTableWriter.java:367) >>>>>> ~[apache-cassandra-3.10.jar:3.10] >>>>>> at >>>>>> >>>>>> org.apache.cassandra.utils.concurrent.Transactional$AbstractTransactional.prepareToCommit(Transactional.java:173) >>>>>> ~[apache-cassandra-3.10.jar:3.10] >>>>>> at >>>>>> org.apache.cassandra.io >>>>>> >>>>>> <http://org.apache.cassandra.io>.sstable.format.SSTableWriter.prepareToCommit(SSTableWriter.java:281) >>>>>> ~[apache-cassandra-3.10.jar:3.10] >>>>>> at >>>>>> org.apache.cassandra.io >>>>>> >>>>>> <http://org.apache.cassandra.io>.sstable.SimpleSSTableMultiWriter.prepareToCommit(SimpleSSTableMultiWriter.java:101) >>>>>> ~[apache-cassandra-3.10.jar:3.10] >>>>>> at >>>>>> >>>>>> org.apache.cassandra.db.ColumnFamilyStore$Flush.flushMemtable(ColumnFamilyStore.java:1153) >>>>>> ~[apache-cassandra-3.10.jar:3.10] >>>>>> at >>>>>> >>>>>> org.apache.cassandra.db.ColumnFamilyStore$Flush.run(ColumnFamilyStore.java:1086) >>>>>> ~[apache-cassandra-3.10.jar:3.10] >>>>>> at >>>>>> >>>>>> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) >>>>>> ~[na:1.8.0_121] >>>>>> at >>>>>> >>>>>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) >>>>>> [na:1.8.0_121] >>>>>> at >>>>>> >>>>>> org.apache.cassandra.concurrent.NamedThreadFactory.lambda$threadLocalDeallocator$0(NamedThreadFactory.java:79) >>>>>> [apache-cassandra-3.10.jar:3.10] >>>>>> at java.lang.Thread.run(Thread.java:745) ~[na:1.8.0_121] >>>>>> Caused by: java.io.IOException: Input/output error >>>>>> at sun.nio.ch.FileDispatcherImpl.force0(Native Method) >>>>>> ~[na:1.8.0_121] >>>>>> at >>>>>> sun.nio.ch.FileDispatcherImpl.force(FileDispatcherImpl.java:76) >>>>>> ~[na:1.8.0_121] >>>>>> at sun.nio.ch.FileChannelImpl.force(FileChannelImpl.java:388) >>>>>> ~[na:1.8.0_121] >>>>>> at org.apache.cassandra.utils.SyncUtil.force(SyncUtil.java:158) >>>>>> ~[apache-cassandra-3.10.jar:3.10] >>>>>> at >>>>>> >>>>>> org.apache.cassandra.io.util.SequentialWriter.syncDataOnlyInternal(SequentialWriter.java:169) >>>>>> ~[apache-cassandra-3.10.jar:3.10] >>>>>> ... 15 common frames omitted >>>>>> INFO [IndexSummaryManager:1] 2017-04-06 06:22:18,366 >>>>>> IndexSummaryRedistribution.java:75 - Redistributing index summaries >>>>>> ERROR [MemtablePostFlush:31] 2017-04-06 06:39:19,525 >>>>>> CassandraDaemon.java:229 - Exception in thread >>>>>> Thread[MemtablePostFlush:31,5,main] >>>>>> org.apache.cassandra.io >>>>>> <http://org.apache.cassandra.io>.FSWriteError: >>>>>> java.io.IOException: Input/output >>>>>> error >>>>>> at >>>>>> >>>>>> org.apache.cassandra.io.util.SequentialWriter.syncDataOnlyInternal(SequentialWriter.java:173) >>>>>> ~[apache-cassandra-3.10.jar:3.10] >>>>>> at >>>>>> >>>>>> org.apache.cassandra.io.util.SequentialWriter.syncInternal(SequentialWriter.java:185) >>>>>> ~[apache-cassandra-3.10.jar:3.10] >>>>>> at >>>>>> org.apache.cassandra.io >>>>>> >>>>>> <http://org.apache.cassandra.io>.compress.CompressedSequentialWriter.access$100(CompressedSequentialWriter.java:38) >>>>>> ~[apache-cassandra-3.10.jar:3.10] >>>>>> at >>>>>> org.apache.cassandra.io >>>>>> >>>>>> <http://org.apache.cassandra.io>.compress.CompressedSequentialWriter$TransactionalProxy.doPrepare(CompressedSequentialWriter.java:307) >>>>>> ~[apache-cassandra-3.10.jar:3.10] >>>>>> at >>>>>> >>>>>> org.apache.cassandra.utils.concurrent.Transactional$AbstractTransactional.prepareToCommit(Transactional.java:173) >>>>>> ~[apache-cassandra-3.10.jar:3.10] >>>>>> at >>>>>> >>>>>> org.apache.cassandra.io.util.SequentialWriter.prepareToCommit(SequentialWriter.java:358) >>>>>> ~[apache-cassandra-3.10.jar:3.10] >>>>>> at >>>>>> org.apache.cassandra.io >>>>>> >>>>>> <http://org.apache.cassandra.io>.sstable.format.big.BigTableWriter$TransactionalProxy.doPrepare(BigTableWriter.java:367) >>>>>> ~[apache-cassandra-3.10.jar:3.10] >>>>>> at >>>>>> >>>>>> org.apache.cassandra.utils.concurrent.Transactional$AbstractTransactional.prepareToCommit(Transactional.java:173) >>>>>> ~[apache-cassandra-3.10.jar:3.10] >>>>>> at >>>>>> org.apache.cassandra.io >>>>>> >>>>>> <http://org.apache.cassandra.io>.sstable.format.SSTableWriter.prepareToCommit(SSTableWriter.java:281) >>>>>> ~[apache-cassandra-3.10.jar:3.10] >>>>>> at >>>>>> org.apache.cassandra.io >>>>>> >>>>>> <http://org.apache.cassandra.io>.sstable.SimpleSSTableMultiWriter.prepareToCommit(SimpleSSTableMultiWriter.java:101) >>>>>> ~[apache-cassandra-3.10.jar:3.10] >>>>>> at >>>>>> >>>>>> org.apache.cassandra.db.ColumnFamilyStore$Flush.flushMemtable(ColumnFamilyStore.java:1153) >>>>>> ~[apache-cassandra-3.10.jar:3.10] >>>>>> at >>>>>> >>>>>> org.apache.cassandra.db.ColumnFamilyStore$Flush.run(ColumnFamilyStore.java:1086) >>>>>> ~[apache-cassandra-3.10.jar:3.10] >>>>>> at >>>>>> >>>>>> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) >>>>>> ~[na:1.8.0_121] >>>>>> at >>>>>> >>>>>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) >>>>>> [na:1.8.0_121] >>>>>> at >>>>>> >>>>>> org.apache.cassandra.concurrent.NamedThreadFactory.lambda$threadLocalDeallocator$0(NamedThreadFactory.java:79) >>>>>> [apache-cassandra-3.10.jar:3.10] >>>>>> at java.lang.Thread.run(Thread.java:745) ~[na:1.8.0_121] >>>>>> Caused by: java.io.IOException: Input/output error >>>>>> at sun.nio.ch.FileDispatcherImpl.force0(Native Method) >>>>>> ~[na:1.8.0_121] >>>>>> at >>>>>> sun.nio.ch.FileDispatcherImpl.force(FileDispatcherImpl.java:76) >>>>>> ~[na:1.8.0_121] >>>>>> at sun.nio.ch.FileChannelImpl.force(FileChannelImpl.java:388) >>>>>> ~[na:1.8.0_121] >>>>>> at org.apache.cassandra.utils.SyncUtil.force(SyncUtil.java:158) >>>>>> ~[apache-cassandra-3.10.jar:3.10] >>>>>> at >>>>>> >>>>>> org.apache.cassandra.io.util.SequentialWriter.syncDataOnlyInternal(SequentialWriter.java:169) >>>>>> ~[apache-cassandra-3.10.jar:3.10] >>>>>> ... 15 common frames omitted >>>>>> INFO [main] 2017-04-06 07:11:57,289 YamlConfigurationLoader.java:89 >>>>>> - >>>>>> Configuration location: file:/etc/cassandra/cassandra.yaml >>>>>> >>>>>> >>>>>> Some ERRORs messages: >>>>>> >>>>>> ERROR [MemtablePostFlush:2] 2017-04-05 23:35:46,339 >>>>>> CassandraDaemon.java:229 - Exception in thread >>>>>> Thread[MemtablePostFlush:2,5,main] >>>>>> ERROR [MemtablePostFlush:3] 2017-04-05 23:44:08,471 >>>>>> CassandraDaemon.java:229 - Exception in thread >>>>>> Thread[MemtablePostFlush:3,5,main] >>>>>> ERROR [MemtablePostFlush:4] 2017-04-05 23:54:41,224 >>>>>> CassandraDaemon.java:229 - Exception in thread >>>>>> Thread[MemtablePostFlush:4,5,main] >>>>>> ERROR [MessagingService-Incoming-/10.0.120.52 >>>>>> <http://10.0.120.52>] 2017-04-06 03:19:13,453 >>>>>> CassandraDaemon.java:229 - Exception in thread >>>>>> Thread[MessagingService-Incoming-/10.0.120.52 >>>>>> <http://10.0.120.52>,5,main] >>>>>> ERROR [epollEventLoopGroup-2-6] 2017-04-06 03:24:41,006 >>>>>> CassandraDaemon.java:229 - Exception in thread >>>>>> Thread[epollEventLoopGroup-2-6,10,main] >>>>>> ERROR [Native-Transport-Requests-36] 2017-04-06 03:25:45,915 >>>>>> JVMStabilityInspector.java:142 - JVM state determined to be unstable. >>>>>> Exiting forcefully due to: >>>>>> ERROR [Native-Transport-Requests-49] 2017-04-06 03:25:45,915 >>>>>> JVMStabilityInspector.java:142 - JVM state determined to be unstable. >>>>>> Exiting forcefully due to: >>>>>> ERROR [IndexSummaryManager:1] 2017-04-06 03:25:45,915 >>>>>> JVMStabilityInspector.java:142 - JVM state determined to be unstable. >>>>>> Exiting forcefully due to: >>>>>> ERROR [Native-Transport-Requests-69] 2017-04-06 03:25:45,916 >>>>>> JVMStabilityInspector.java:142 - JVM state determined to be unstable. >>>>>> Exiting forcefully due to: >>>>>> ERROR [Native-Transport-Requests-46] 2017-04-06 03:26:18,465 >>>>>> JVMStabilityInspector.java:142 - JVM state determined to be unstable. >>>>>> Exiting forcefully due to: >>>>>> ERROR [SharedPool-Worker-136] 2017-04-06 03:26:18,465 >>>>>> JVMStabilityInspector.java:142 - JVM state determined to be unstable. >>>>>> Exiting forcefully due to: >>>>>> ERROR [Native-Transport-Requests-156] 2017-04-06 03:26:18,465 >>>>>> JVMStabilityInspector.java:142 - JVM state determined to be unstable. >>>>>> Exiting forcefully due to: >>>>>> ERROR [SharedPool-Worker-92] 2017-04-06 03:26:24,696 >>>>>> JVMStabilityInspector.java:142 - JVM state determined to be unstable. >>>>>> Exiting forcefully due to: >>>>>> ERROR [Native-Transport-Requests-48] 2017-04-06 03:26:24,696 ?:? - >>>>>> JVM >>>>>> state determined to be unstable. Exiting forcefully due to: >>>>>> ERROR [Native-Transport-Requests-66] 2017-04-06 03:26:55,808 >>>>>> JVMStabilityInspector.java:142 - JVM state determined to be unstable. >>>>>> Exiting forcefully due to: >>>>>> ERROR [Native-Transport-Requests-77] 2017-04-06 03:26:55,808 >>>>>> JVMStabilityInspector.java:142 - JVM state determined to be unstable. >>>>>> Exiting forcefully due to: >>>>>> ERROR [GossipTasks:1] 2017-04-06 03:26:55,808 >>>>>> JVMStabilityInspector.java:142 - JVM state determined to be unstable. >>>>>> Exiting forcefully due to: >>>>>> ERROR [Native-Transport-Requests-133] 2017-04-06 03:26:55,808 >>>>>> JVMStabilityInspector.java:142 - JVM state determined to be unstable. >>>>>> Exiting forcefully due to: >>>>>> ERROR [Native-Transport-Requests-135] 2017-04-06 03:26:55,808 >>>>>> JVMStabilityInspector.java:142 - JVM state determined to be unstable. >>>>>> Exiting forcefully due to: >>>>>> ERROR [ScheduledFastTasks:1] 2017-04-06 03:26:55,808 >>>>>> JVMStabilityInspector.java:142 - JVM state determined to be unstable. >>>>>> Exiting forcefully due to: >>>>>> ERROR [Native-Transport-Requests-70] 2017-04-06 03:27:11,569 >>>>>> JVMStabilityInspector.java:142 - JVM state determined to be unstable. >>>>>> Exiting forcefully due to: >>>>>> ERROR [IndexSummaryManager:1] 2017-04-06 03:27:17,821 >>>>>> CassandraDaemon.java:229 - Exception in thread >>>>>> Thread[IndexSummaryManager:1,1,main] >>>>>> ERROR [Native-Transport-Requests-103] 2017-04-06 03:27:24,049 >>>>>> JVMStabilityInspector.java:142 - JVM state determined to be unstable. >>>>>> Exiting forcefully due to: >>>>>> ERROR [Native-Transport-Requests-69] 2017-04-06 03:27:24,049 >>>>>> SEPWorker.java:145 - Failed to execute task, unexpected exception >>>>>> killed >>>>>> worker: {} >>>>>> ERROR [SharedPool-Worker-98] 2017-04-06 03:27:24,049 >>>>>> JVMStabilityInspector.java:142 - JVM state determined to be unstable. >>>>>> Exiting forcefully due to: >>>>>> ERROR [MessagingService-Incoming-/10.0.120.52 >>>>>> <http://10.0.120.52>] 2017-04-06 03:27:55,079 >>>>>> JVMStabilityInspector.java:142 - JVM state determined to be unstable. >>>>>> Exiting forcefully due to: >>>>>> ERROR [epollEventLoopGroup-2-5] 2017-04-06 03:27:55,079 >>>>>> JVMStabilityInspector.java:142 - JVM state determined to be unstable. >>>>>> Exiting forcefully due to: >>>>>> ERROR [Native-Transport-Requests-64] 2017-04-06 03:28:43,285 >>>>>> SEPWorker.java:145 - Failed to execute task, unexpected exception >>>>>> killed >>>>>> worker: {} >>>>>> ERROR [MemtablePostFlush:22] 2017-04-06 06:00:26,800 >>>>>> CassandraDaemon.java:229 - Exception in thread >>>>>> Thread[MemtablePostFlush:22,5,main] >>>>>> ERROR [MemtablePostFlush:31] 2017-04-06 06:39:19,525 >>>>>> CassandraDaemon.java:229 - Exception in thread >>>>>> Thread[MemtablePostFlush:31,5,main] >>>>>> >>>>>> Also some WARNs: >>>>>> >>>>>> WARN [main] 2017-04-06 09:26:49,725 CLibrary.java:178 - Unable to >>>>>> lock >>>>>> JVM memory (ENOMEM). This can result in part of the JVM being swapped >>>>>> out, especially with mmapped I/O enabled. Increase RLIMIT_MEMLOCK >>>>>> or run >>>>>> Cassandra as root. >>>>>> >>>>>> WARN [main] 2017-04-06 09:25:07,355 StartupChecks.java:157 - JMX >>>>>> is not >>>>>> enabled to receive remote connections. Please see cassandra-env.sh >>>>>> for >>>>>> more info. >>>>>> >>>>>> WARN [main] 2017-04-06 09:25:07,369 SigarLibrary.java:174 - >>>>>> Cassandra >>>>>> server running in degraded mode. Is swap disabled? : true, Address >>>>>> space adequate? : true, nofile limit adequate? : false, nproc limit >>>>>> adequate? : true >>>>>> >>>>>> WARN [main] 2017-04-06 09:25:07,091 DatabaseDescriptor.java:493 - >>>>>> Small >>>>>> cdc volume detected at /var/lib/cassandra/cdc_raw; setting >>>>>> cdc_total_space_in_mb to 2502. You can override this in >>>>>> cassandra.yaml >>>>>> >>>>>> >>>>>> >>> >> >
