[JBoss 7.1.0.Final] High CPU usage for single-core CPU VMWare virtual machine running Redhat 6 OS ------------------------------------------------------------------------------------------------- Key: AS7-5224 URL: https://issues.jboss.org/browse/AS7-5224 Project: Application Server 7 Issue Type: Bug Components: Server Affects Versions: 7.1.0.Final Environment: -bash-4.1$ cat /proc/version Linux version 2.6.32-279.el6.x86_64 (mockbuild(a)x86-008.build.bos.redhat.com) (gcc version 4.4.6 20120305 (Red Hat 4.4.6-4) (GCC) ) #1 SMP Wed Jun 13 18:24:36 EDT 2012 -bash-4.1$ cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 44 model name : Intel(R) Xeon(R) CPU X5650 @ 2.67GHz stepping : 2 cpu MHz : 2666.761 cache size : 12288 KB fpu : yes fpu_exception : yes cpuid level : 11 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss syscall nx rdtscp lm constant_tsc up arch_perfmon pebs bts xtopology tsc_reliable nonstop_tsc aperfmperf unfair_spinlock pni pclmulqdq ssse3 cx16 sse4_1 sse4_2 popcnt aes hypervisor lahf_lm ida arat epb dts bogomips : 5333.52 clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: -bash-4.1$ cat /proc/meminfo MemTotal: 3925212 kB MemFree: 328048 kB Buffers: 21276 kB Cached: 3268128 kB SwapCached: 180 kB Active: 1832808 kB Inactive: 1475292 kB Active(anon): 3104 kB Inactive(anon): 16008 kB Active(file): 1829704 kB Inactive(file): 1459284 kB Unevictable: 0 kB Mlocked: 0 kB SwapTotal: 8388600 kB SwapFree: 8387940 kB Dirty: 0 kB Writeback: 0 kB AnonPages: 18624 kB Mapped: 12656 kB Shmem: 416 kB Slab: 220480 kB SReclaimable: 196296 kB SUnreclaim: 24184 kB KernelStack: 792 kB PageTables: 6980 kB NFS_Unstable: 0 kB Bounce: 0 kB WritebackTmp: 0 kB CommitLimit: 10351204 kB Committed_AS: 102640 kB VmallocTotal: 34359738367 kB VmallocUsed: 283176 kB VmallocChunk: 34359452028 kB HardwareCorrupted: 0 kB AnonHugePages: 0 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 2048 kB DirectMap4k: 10240 kB DirectMap2M: 4184064 kB Reporter: Claudiu Muresan Assignee: Jason Greene Attachments: boot.log, jboss-modules-2012-08-14-shutdown.zip, jstack.thread.dump, process.args, standalone.conf, standalone.xml, top When starting JBoss server in standalone configuration we have 100% CPU usage. There are no deployments. Please view attached items: thread dump, standalone.conf, standalone.xml. The JVM version is -bash-4.1$ ./java -version java version "1.6.0_27" Java(TM) SE Runtime Environment (build 1.6.0_27-b07) Java HotSpot(TM) 64-Bit Server VM (build 20.2-b06, mixed mode) . Tried also with the latest JVM version (6u33) => high CPU usage. Tried also with 7.1.1 Final and same configuration(standalone.conf/standalone.xml) => high CPU usage.