WARNING: Linux JNA-based affinity not usable because it failed to load! Reason: java.lang.ExceptionInInitializerError

[Mike Bundy]

I am having the following problem running on Ubuntu 15.10 Workstation under VMWare 12.  The exception is thrown on my first call to startExcerpt().  Same code runs fine on a bare metal host running Ubuntu 15.10 Server.

Jan 12, 2016 7:09:58 AM net.openhft.affinity.Affinity logThrowable

WARNING: Linux JNA-based affinity not usable because it failed to load! Reason: java.lang.ExceptionInInitializerError

at net.openhft.affinity.Affinity.isLinuxJNAAffinityUsable(Affinity.java:112)

at net.openhft.affinity.Affinity.<clinit>(Affinity.java:51)

at net.openhft.affinity.AffinitySupport.getThreadId(AffinitySupport.java:28)

at net.openhft.chronicle.VanillaChronicle$VanillaAppenderImpl.startExcerpt(VanillaChronicle.java:613)

at net.openhft.chronicle.VanillaChronicle$VanillaAppenderImpl.startExcerpt(VanillaChronicle.java:605)

at com.fxone.common.io.HftSession.sendMessage(HftSession.java:164)

at com.fxone.common.io.HftChannel.sendMessage(HftChannel.java:156)

at com.fxone.common.io.MessageTransport.sendMessage(MessageTransport.java:148)

at com.fxone.common.io.MessageProxy.sendMessage(MessageProxy.java:378)

at com.fxone.reef.servers.Scheduler.open(Scheduler.java:359)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:497)

at com.fxone.common.admin.ReflectionCommand.doExecute(ReflectionCommand.java:339)

at com.fxone.common.admin.ReflectionCommand.executeIn(ReflectionCommand.java:218)

at com.fxone.common.admin.CommandManager.execute(CommandManager.java:226)

at com.fxone.common.admin.LoadFileCommand.loadConfig(LoadFileCommand.java:48)

at com.fxone.reef.Main.main(Main.java:76)

Caused by: java.lang.IllegalStateException: sched_getaffinity(0, (8) , cpuset) failed; errno=22

at net.openhft.affinity.impl.LinuxHelper.sched_getaffinity(LinuxHelper.java:220)

at net.openhft.affinity.impl.LinuxJNAAffinity.getAffinity(LinuxJNAAffinity.java:38)

at net.openhft.affinity.impl.LinuxJNAAffinity.<clinit>(LinuxJNAAffinity.java:137)

... 19 more

Caused by: com.sun.jna.LastErrorException: [22] h#

at com.sun.jna.Native.invokeInt(Native Method)

at com.sun.jna.Function.invoke(Function.java:383)

at com.sun.jna.Function.invoke(Function.java:315)

at com.sun.jna.Library$Handler.invoke(Library.java:212)

at net.openhft.affinity.impl.$Proxy3.sched_getaffinity(Unknown Source)

at net.openhft.affinity.impl.LinuxHelper.sched_getaffinity(LinuxHelper.java:215)

... 21 more

Jan 12, 2016 7:09:58 AM net.openhft.affinity.Affinity logThrowable

WARNING: Posix JNA-based affinity not usable because it failed to load! Reason: java.lang.ExceptionInInitializerError

at net.openhft.affinity.Affinity.isPosixJNAAffinityUsable(Affinity.java:98)

at net.openhft.affinity.Affinity.<clinit>(Affinity.java:55)

at net.openhft.affinity.AffinitySupport.getThreadId(AffinitySupport.java:28)

at net.openhft.chronicle.VanillaChronicle$VanillaAppenderImpl.startExcerpt(VanillaChronicle.java:613)

at net.openhft.chronicle.VanillaChronicle$VanillaAppenderImpl.startExcerpt(VanillaChronicle.java:605)

at com.fxone.common.io.HftSession.sendMessage(HftSession.java:164)

at com.fxone.common.io.HftChannel.sendMessage(HftChannel.java:156)

at com.fxone.common.io.MessageTransport.sendMessage(MessageTransport.java:148)

at com.fxone.common.io.MessageProxy.sendMessage(MessageProxy.java:378)

at com.fxone.reef.servers.Scheduler.open(Scheduler.java:359)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:497)

at com.fxone.common.admin.ReflectionCommand.doExecute(ReflectionCommand.java:339)

at com.fxone.common.admin.ReflectionCommand.executeIn(ReflectionCommand.java:218)

at com.fxone.common.admin.CommandManager.execute(CommandManager.java:226)

at com.fxone.common.admin.LoadFileCommand.loadConfig(LoadFileCommand.java:48)

at com.fxone.reef.Main.main(Main.java:76)

Caused by: java.lang.IllegalStateException: sched_getaffinity((4) , &(allocated@0x7f67006509f0 (4 bytes) (com.sun.jna.ptr.IntByReference@658957)) ) errorNo=22

at net.openhft.affinity.impl.PosixJNAAffinity.getAffinity(PosixJNAAffinity.java:89)

at net.openhft.affinity.impl.PosixJNAAffinity.<clinit>(PosixJNAAffinity.java:249)

... 19 more

Caused by: com.sun.jna.LastErrorException: [22] ðw

at com.sun.jna.Native.invokeInt(Native Method)

at com.sun.jna.Function.invoke(Function.java:383)

at com.sun.jna.Function.invoke(Function.java:315)

at com.sun.jna.Library$Handler.invoke(Library.java:212)

at net.openhft.affinity.impl.$Proxy4.sched_getaffinity(Unknown Source)

at net.openhft.affinity.impl.PosixJNAAffinity.getAffinity(PosixJNAAffinity.java:78)

... 20 more

[Peter Lawrey]

You should note that CPU binding on a virtual machine won't do anything useful as you are not binding to a real cpu in any case. Never the less it shouldn't report this error either.

What we can do is treat errorno 22 (Invalid mode) to disable thread affinity.

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[Mike Bundy]

It does finish with:

...

INFO: Using dummy affinity control implementation

But no queue is created, no excerpt written.  

The only reason we use VMWare is for our development workstations (to test across multiple os's).  Any suggestions for getting the dummy affinity control to work?

Thanks,

Mike

[Peter Lawrey]

A work around we use is only use the Affinity library when it is enabled on the command line through a System property you define.

[Mike Bundy]

Figured it out.  Simply set vcpu.hotadd = "FALSE" in the VMWare VMX file.

Mike