# Why elasticsearch-5.2.0 throw NullPointerException when start **URL:** \ **Category:** Elasticsearch\ **Created:** [February 11, 2017, 3:17am UTC](https://discuss.elastic.co/t/why-elasticsearch-5-2-0-throw-nullpointerexception-when-start/74739 "2017-02-11T03:17:31Z")\ **Posts on this page:** 15\ **Page:** 1
**Author:** ![xiaodong.hu](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/xiaodong.hu/32/20370_2.png) [@xiaodong.hu](https://discuss.elastic.co/u/xiaodong.hu)\ **Post date:** [February 11, 2017, 3:17am UTC](https://discuss.elastic.co/t/why-elasticsearch-5-2-0-throw-nullpointerexception-when-start/74739/1 "2017-02-11T03:17:31Z")
mr@zdh108:~/elasticsearch-5.2.0/bin\> java -version java version "1.8.0\_121" Java(TM) SE Runtime Environment (build 1.8.0\_121-b13) Java HotSpot(TM) 64-Bit Server VM (build 25.121-b13, mixed mode) mr@zdh108:~/elasticsearch-5.2.0/bin\> cat /etc/issue Welcome to SUSE Linux Enterprise Server 12 SP1 (x86\_64) - Kernel \r (\l). mr@zdh108:~/elasticsearch-5.2.0/bin\> ./elasticsearch [2017-02-11T11:15:06,585][INFO][o.e.n.Node] [] initializing ... [2017-02-11T11:15:06,690][INFO][o.e.e.NodeEnvironment] [KCqSYpD] using [1] data paths, mounts [[/ (rootfs)]], net usable\_space [132.4gb], net total\_space [179.9gb], spins? [unknown], types [rootfs] [2017-02-11T11:15:06,690][INFO][o.e.e.NodeEnvironment] [KCqSYpD] heap size [1.9gb], compressed ordinary object pointers [true] [2017-02-11T11:15:06,691][INFO][o.e.n.Node] node name [KCqSYpD] derived from node ID [KCqSYpDhTbKEPkHxB1UDxg]; set [[node.name](http://node.name)] to override [2017-02-11T11:15:06,694][INFO][o.e.n.Node] version[5.2.0], pid[52315], build[24e05b9/2017-01-24T19:52:35.800Z], OS[Linux/3.12.49-11-default/amd64], JVM[Oracle Corporation/Java HotSpot(TM) 64-Bit Server VM/1.8.0\_121/25.121-b13] [2017-02-11T11:15:07,666][INFO][o.e.p.PluginsService] [KCqSYpD] loaded module [aggs-matrix-stats] [2017-02-11T11:15:07,666][INFO][o.e.p.PluginsService] [KCqSYpD] loaded module [ingest-common] [2017-02-11T11:15:07,666][INFO][o.e.p.PluginsService] [KCqSYpD] loaded module [lang-expression] [2017-02-11T11:15:07,666][INFO][o.e.p.PluginsService] [KCqSYpD] loaded module [lang-groovy] [2017-02-11T11:15:07,667][INFO][o.e.p.PluginsService] [KCqSYpD] loaded module [lang-mustache] [2017-02-11T11:15:07,667][INFO][o.e.p.PluginsService] [KCqSYpD] loaded module [lang-painless] [2017-02-11T11:15:07,667][INFO][o.e.p.PluginsService] [KCqSYpD] loaded module [percolator] [2017-02-11T11:15:07,667][INFO][o.e.p.PluginsService] [KCqSYpD] loaded module [reindex] [2017-02-11T11:15:07,667][INFO][o.e.p.PluginsService] [KCqSYpD] loaded module [transport-netty3] [2017-02-11T11:15:07,668][INFO][o.e.p.PluginsService] [KCqSYpD] loaded module [transport-netty4] [2017-02-11T11:15:07,668][INFO][o.e.p.PluginsService] [KCqSYpD] no plugins loaded [2017-02-11T11:15:08,442][WARN][o.e.b.ElasticsearchUncaughtExceptionHandler] [] uncaught exception in thread [main] org.elasticsearch.bootstrap.StartupException: java.lang.NullPointerException at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:125) ~[elasticsearch-5.2.0.jar:5.2.0] at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:112) ~[elasticsearch-5.2.0.jar:5.2.0] at org.elasticsearch.cli.SettingCommand.execute(SettingCommand.java:54) ~[elasticsearch-5.2.0.jar:5.2.0] at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:122) ~[elasticsearch-5.2.0.jar:5.2.0] at org.elasticsearch.cli.Command.main(Command.java:88) ~[elasticsearch-5.2.0.jar:5.2.0] at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:89) ~[elasticsearch-5.2.0.jar:5.2.0] at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:82) ~[elasticsearch-5.2.0.jar:5.2.0] Caused by: java.lang.NullPointerException at sun.nio.fs.UnixFileSystem.getPath(UnixFileSystem.java:273) ~[?:?] at org.elasticsearch.common.io.PathUtils.get(PathUtils.java:60) ~[elasticsearch-5.2.0.jar:5.2.0] at org.elasticsearch.monitor.os.OsProbe.readSysFsCgroupCpuAcctCpuAcctUsage(OsProbe.java:274) ~[elasticsearch-5.2.0.jar:5.2.0] at org.elasticsearch.monitor.os.OsProbe.getCgroupCpuAcctUsageNanos(OsProbe.java:261) ~[elasticsearch-5.2.0.jar:5.2.0] at org.elasticsearch.monitor.os.OsProbe.getCgroup(OsProbe.java:419) ~[elasticsearch-5.2.0.jar:5.2.0] at org.elasticsearch.monitor.os.OsProbe.osStats(OsProbe.java:466) ~[elasticsearch-5.2.0.jar:5.2.0] at org.elasticsearch.monitor.os.OsService.(OsService.java:45) ~[elasticsearch-5.2.0.jar:5.2.0] at org.elasticsearch.monitor.MonitorService.(MonitorService.java:45) ~[elasticsearch-5.2.0.jar:5.2.0] at org.elasticsearch.node.Node.(Node.java:345) ~[elasticsearch-5.2.0.jar:5.2.0] at org.elasticsearch.node.Node.(Node.java:232) ~[elasticsearch-5.2.0.jar:5.2.0] at org.elasticsearch.bootstrap.Bootstrap$6.(Bootstrap.java:241) ~[elasticsearch-5.2.0.jar:5.2.0] at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:241) ~[elasticsearch-5.2.0.jar:5.2.0] at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:333) ~[elasticsearch-5.2.0.jar:5.2.0] at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:121) ~[elasticsearch-5.2.0.jar:5.2.0] ... 6 more ---
**Author:** ![jasontedor](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jasontedor/32/66992_2.png) [@jasontedor](https://discuss.elastic.co/u/jasontedor)\ **Post date:** [February 12, 2017, 5:30pm UTC](https://discuss.elastic.co/t/why-elasticsearch-5-2-0-throw-nullpointerexception-when-start/74739/2 "2017-02-12T17:30:29Z")
Okay, so clearly the CPU control group is coming back `null`, now we need to figure out why. Can you please provide the output of `tree -L 2 /sys/fs/cgroup` and do the following? 1. Start Elasticsearch with `ES_JAVA_OPTS="-agentlib:jdwp=transport=dt_socket,server=y,suspend=y,address=5005" ./elasticsearch` 2. When Elasticsearch starts, it will print `Listening for transport dt_socket at address: 5005` to the console. Let the process hang here. 3. When this message appears, execute `ps aux | grep Elasticsearch` and obtain the PID for the Elasticsearch process just started. 4. Then, provide the output of `cat /proc//cgroup` (with `` replaced by the PID obtained in step 3). 5. Terminate the Elasticsearch process. Thanks. ---
**Author:** ![xiaodong.hu](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/xiaodong.hu/32/20370_2.png) [@xiaodong.hu](https://discuss.elastic.co/u/xiaodong.hu)\ **Post date:** [March 1, 2017, 2:17am UTC](https://discuss.elastic.co/t/why-elasticsearch-5-2-0-throw-nullpointerexception-when-start/74739/3 "2017-03-01T02:17:57Z")
zdh108:~ # tree -L 2 /sys/fs/cgroup /sys/fs/cgroup ├── blkio │ ├── blkio.io\_merged │ ├── blkio.io\_merged\_recursive │ ├── blkio.io\_queued │ ├── blkio.io\_queued\_recursive │ ├── blkio.io\_service\_bytes │ ├── blkio.io\_service\_bytes\_recursive │ ├── blkio.io\_service\_time │ ├── blkio.io\_service\_time\_recursive │ ├── blkio.io\_serviced │ ├── blkio.io\_serviced\_recursive │ ├── blkio.io\_wait\_time │ ├── blkio.io\_wait\_time\_recursive │ ├── blkio.leaf\_weight │ ├── blkio.leaf\_weight\_device │ ├── blkio.reset\_stats │ ├── blkio.sectors │ ├── blkio.sectors\_recursive │ ├── blkio.throttle.io\_service\_bytes │ ├── blkio.throttle.io\_serviced │ ├── blkio.throttle.read\_bps\_device │ ├── blkio.throttle.read\_iops\_device │ ├── blkio.throttle.write\_bps\_device │ ├── blkio.throttle.write\_iops\_device │ ├── blkio.time │ ├── blkio.time\_recursive │ ├── blkio.weight │ ├── blkio.weight\_device │ ├── cgroup.clone\_children │ ├── cgroup.event\_control │ ├── cgroup.procs │ ├── cgroup.sane\_behavior │ ├── notify\_on\_release │ ├── release\_agent │ └── tasks ├── cpu -\> cpu,cpuacct ├── cpu,cpuacct │ └── cgroup.procs ├── cpuacct -\> cpu,cpuacct ├── cpuset │ ├── cgroup.clone\_children │ ├── cgroup.event\_control │ ├── cgroup.procs │ ├── cgroup.sane\_behavior │ ├── cpuset.cpu\_exclusive │ ├── cpuset.cpus │ ├── cpuset.mem\_exclusive │ ├── cpuset.mem\_hardwall │ ├── cpuset.memory\_migrate │ ├── cpuset.memory\_pressure │ ├── cpuset.memory\_pressure\_enabled │ ├── cpuset.memory\_spread\_page │ ├── cpuset.memory\_spread\_slab │ ├── cpuset.mems │ ├── cpuset.sched\_load\_balance │ ├── cpuset.sched\_relax\_domain\_level │ ├── notify\_on\_release │ ├── release\_agent │ └── tasks ├── devices │ ├── cgroup.clone\_children │ ├── cgroup.event\_control │ ├── cgroup.procs │ ├── cgroup.sane\_behavior │ ├── devices.allow │ ├── devices.deny │ ├── devices.list │ ├── notify\_on\_release │ ├── release\_agent │ └── tasks ├── freezer │ ├── cgroup.clone\_children │ ├── cgroup.event\_control │ ├── cgroup.procs │ ├── cgroup.sane\_behavior │ ├── notify\_on\_release │ ├── release\_agent │ └── tasks ├── hugetlb │ ├── cgroup.clone\_children │ ├── cgroup.event\_control │ ├── cgroup.procs │ ├── cgroup.sane\_behavior │ ├── hugetlb.2MB.failcnt │ ├── hugetlb.2MB.limit\_in\_bytes │ ├── hugetlb.2MB.max\_usage\_in\_bytes │ ├── hugetlb.2MB.usage\_in\_bytes │ ├── notify\_on\_release │ ├── release\_agent │ └── tasks ├── memory │ ├── cgroup.clone\_children │ ├── cgroup.event\_control │ ├── cgroup.procs │ ├── cgroup.sane\_behavior │ ├── memory.failcnt │ ├── memory.force\_empty │ ├── memory.limit\_in\_bytes │ ├── memory.low\_limit\_in\_bytes │ ├── memory.max\_usage\_in\_bytes │ ├── memory.move\_charge\_at\_immigrate │ ├── memory.numa\_stat │ ├── memory.oom\_control │ ├── memory.pressure\_level │ ├── memory.soft\_limit\_in\_bytes │ ├── memory.stat │ ├── memory.swappiness │ ├── memory.usage\_in\_bytes │ ├── memory.use\_hierarchy │ ├── notify\_on\_release │ ├── release\_agent │ └── tasks ├── perf\_event │ ├── cgroup.clone\_children │ ├── cgroup.event\_control │ ├── cgroup.procs │ ├── cgroup.sane\_behavior │ ├── notify\_on\_release │ ├── release\_agent │ └── tasks └── systemd ├── cgroup.clone\_children ├── cgroup.event\_control ├── cgroup.procs ├── cgroup.sane\_behavior ├── notify\_on\_release ├── release\_agent ├── system.slice ├── tasks └── user.slice zdh108:~ # ps aux | grep Elasticsearch mr 89829 4.5 10.5 4801748 2179528 pts/0 Tl 10:21 0:01 /usr/java/jdk/bin/java -Xms2g -Xmx2g -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSInitiatingOccupancyOnly -XX:+DisableExplicitGC -XX:+AlwaysPreTouch -server -Xss1m -Djava.awt.headless=true -Dfile.encoding=UTF-8 -Djna.nosys=true -Djdk.io.permissionsUseCanonicalPath=true -Dio.netty.noUnsafe=true -Dio.netty.noKeySetOptimization=true -Dio.netty.recycler.maxCapacityPerThread=0 -Dlog4j.shutdownHookEnabled=false -Dlog4j2.disable.jmx=true -Dlog4j.skipJansi=true -XX:+HeapDumpOnOutOfMemoryError -agentlib:jdwp=transport=dt\_socket,server=y,suspend=y,address=5005 -Des.path.home=/home/mr/elasticsearch-5.2.0 -cp /home/mr/elasticsearch-5.2.0/lib/elasticsearch-5.2.0.jar:/home/mr/elasticsearch-5.2.0/lib/\* org.elasticsearch.bootstrap.Elasticsearch root 93813 0.0 0.0 9236 932 pts/3 S+ 10:22 0:00 grep --color=auto Elasticsearch zdh108:~ # cat /proc/89829/cgroup 14:cpu:/ 10:hugetlb:/ 9:perf\_event:/ 8:blkio:/ 7:freezer:/ 6:devices:/ 5:memory:/ 3:cpuset:/ 2:name=systemd:/system.slice/sshd.service ---
**Author:** ![jasontedor](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jasontedor/32/66992_2.png) [@jasontedor](https://discuss.elastic.co/u/jasontedor)\ **Post date:** [March 1, 2017, 5:08am UTC](https://discuss.elastic.co/t/why-elasticsearch-5-2-0-throw-nullpointerexception-when-start/74739/4 "2017-03-01T05:08:44Z")
This is really helpful, thank you. Can you also provide the output of `mount | grep cgroup`? ---
**Author:** ![xiaodong.hu](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/xiaodong.hu/32/20370_2.png) [@xiaodong.hu](https://discuss.elastic.co/u/xiaodong.hu)\ **Post date:** [March 1, 2017, 5:41am UTC](https://discuss.elastic.co/t/why-elasticsearch-5-2-0-throw-nullpointerexception-when-start/74739/5 "2017-03-01T05:41:30Z")
zdh108:~ # mount | grep cgroup tmpfs on /sys/fs/cgroup type tmpfs (rw,nosuid,nodev,noexec,mode=755) cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,xattr,release\_agent=/usr/lib/systemd/systemd-cgroups-agent,name=systemd) cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset) cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory) cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices) cgroup on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer) cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio) cgroup on /sys/fs/cgroup/perf\_event type cgroup (rw,nosuid,nodev,noexec,relatime,perf\_event) cgroup on /sys/fs/cgroup/hugetlb type cgroup (rw,nosuid,nodev,noexec,relatime,hugetlb) none on /home/dapmanager-agent/cgroup/cpu type cgroup (rw,relatime,cpu) ---
**Author:** ![jasontedor](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jasontedor/32/66992_2.png) [@jasontedor](https://discuss.elastic.co/u/jasontedor)\ **Post date:** [March 3, 2017, 11:23pm UTC](https://discuss.elastic.co/t/why-elasticsearch-5-2-0-throw-nullpointerexception-when-start/74739/6 "2017-03-03T23:23:44Z")
Your system is missing cgroupfs mounts with options `cpu` and `cpuacct`. This is unexpected; do you know why that is? ---
**Author:** ![jprante](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jprante/32/44941_2.png) [@jprante](https://discuss.elastic.co/u/jprante)\ **Post date:** [March 4, 2017, 12:17am UTC](https://discuss.elastic.co/t/why-elasticsearch-5-2-0-throw-nullpointerexception-when-start/74739/7 "2017-03-04T00:17:04Z")
This is the case when the Linux kernel cpu scheduler is replaced by another scheduler, like BFS for example. [http://ck.kolivas.org/patches/bfs/bfs-faq.txt](http://ck.kolivas.org/patches/bfs/bfs-faq.txt) > BFS does NOT implement CGROUPS. ---
**Author:** ![jprante](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jprante/32/44941_2.png) [@jprante](https://discuss.elastic.co/u/jprante)\ **Post date:** [March 4, 2017, 12:33am UTC](https://discuss.elastic.co/t/why-elasticsearch-5-2-0-throw-nullpointerexception-when-start/74739/8 "2017-03-04T00:33:20Z")
But, in case of SLES 12, I rather suspect the system does not mount the control group subsystems by default. [https://www.suse.com/documentation/sles-12/singlehtml/book\_sle\_tuning/book\_sle\_tuning.html#sec.tuning.cgroups.subsys](https://www.suse.com/documentation/sles-12/singlehtml/book_sle_tuning/book_sle_tuning.html#sec.tuning.cgroups.subsys) ---
**Author:** ![jasontedor](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jasontedor/32/66992_2.png) [@jasontedor](https://discuss.elastic.co/u/jasontedor)\ **Post date:** [March 4, 2017, 12:38am UTC](https://discuss.elastic.co/t/why-elasticsearch-5-2-0-throw-nullpointerexception-when-start/74739/9 "2017-03-04T00:38:45Z")
Thanks @jprante, I'm aware of the possibility of BFS leading to this, but that does not seem to be the case here as it appears to be a stock SLES 12 SP1 kernel. ---
**Author:** ![jasontedor](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jasontedor/32/66992_2.png) [@jasontedor](https://discuss.elastic.co/u/jasontedor)\ **Post date:** [March 4, 2017, 1:17am UTC](https://discuss.elastic.co/t/why-elasticsearch-5-2-0-throw-nullpointerexception-when-start/74739/10 "2017-03-04T01:17:15Z")
> [@jprante](#): > > But, in case of SLES 12, I rather suspect the system does not mount the control group subsystems by default. I don't think this is the case, but I will check in a stock VM. ---
**Author:** ![jasontedor](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jasontedor/32/66992_2.png) [@jasontedor](https://discuss.elastic.co/u/jasontedor)\ **Post date:** [March 4, 2017, 1:25am UTC](https://discuss.elastic.co/t/why-elasticsearch-5-2-0-throw-nullpointerexception-when-start/74739/11 "2017-03-04T01:25:53Z")
I installed a stock VM from the ISO SLE-12-SP1-Server-DVD-x86\_64-GM-DVD1.iso (MD5: 21ca19898f20866272b8656df82a945e): ```bash 20:25:08 [jason:~] $ ssh -p 2222 localhost Password: Last login: Fri Mar 3 20:33:32 2017 from localhost jason@linux-u4wy:~> cat /etc/issue Welcome to SUSE Linux Enterprise Server 12 SP1 (x86_64) - Kernel \r (\l). jason@linux-u4wy:~> uname -a Linux linux-u4wy 3.12.49-11-default #1 SMP Wed Nov 11 20:52:43 UTC 2015 (8d714a0) x86_64 x86_64 x86_64 GNU/Linux jason@linux-u4wy:~> mount | grep cgroup tmpfs on /sys/fs/cgroup type tmpfs (rw,nosuid,nodev,noexec,mode=755) cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/usr/lib/systemd/systemd-cgroups-agent,name=systemd) cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset) cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpuacct,cpu) cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory) cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices) cgroup on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer) cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio) cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,nosuid,nodev,noexec,relatime,perf_event) cgroup on /sys/fs/cgroup/hugetlb type cgroup (rw,nosuid,nodev,noexec,relatime,hugetlb) jason@linux-u4wy:~> ``` ---
**Author:** ![jasontedor](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jasontedor/32/66992_2.png) [@jasontedor](https://discuss.elastic.co/u/jasontedor)\ **Post date:** [March 4, 2017, 1:41am UTC](https://discuss.elastic.co/t/why-elasticsearch-5-2-0-throw-nullpointerexception-when-start/74739/12 "2017-03-04T01:41:32Z")
Another interesting point here is how `/sys/fs/cgroup/cpu` and `/sys/fs/cgroup/cpuacct` exist despite cgroupfs mounts with mount options `cpu` and `cpuacct` not existing. ---
**Author:** ![xiaodong.hu](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/xiaodong.hu/32/20370_2.png) [@xiaodong.hu](https://discuss.elastic.co/u/xiaodong.hu)\ **Post date:** [March 4, 2017, 4:57am UTC](https://discuss.elastic.co/t/why-elasticsearch-5-2-0-throw-nullpointerexception-when-start/74739/13 "2017-03-04T04:57:24Z")
Sorry, I don't know. ---
**Author:** ![jasontedor](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jasontedor/32/66992_2.png) [@jasontedor](https://discuss.elastic.co/u/jasontedor)\ **Post date:** [March 4, 2017, 5:20am UTC](https://discuss.elastic.co/t/why-elasticsearch-5-2-0-throw-nullpointerexception-when-start/74739/14 "2017-03-04T05:20:36Z")
> Sorry, I don't know. Okay, you can work around this with: ```auto $ sudo mount -t cgroup -o rw,nosuid,nodev,noexec,relatime,cpu,cpuacct cgroup /sys/fs/cgroup/cpu,cpuacct ``` ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [April 1, 2017, 5:20am UTC](https://discuss.elastic.co/t/why-elasticsearch-5-2-0-throw-nullpointerexception-when-start/74739/15 "2017-04-01T05:20:40Z")
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