Re: ERROR : datastax.driver.core.Native:113 - Could not load JNR C Library, native system calls through this library will not be available

[Jeremy Chapman]

Take a look at this discussion: https://groups.google.com/a/lists.datastax.com/forum/#!topic/java-driver-user/ONpgXJyqTu0

In general an UnsatisfiedLinkError often means your app is using an optional dependency of a jar and you just need to either explicitly include the optional dependency or stop using that feature. For example if you opt to configure LZ4 compression to a cluster with cassandra-driver-core you have to add an explicit dependency to 'net.jpountz.lz4:lz4'.

For this FFI case you might be running on an OS that doesn't support FFI and need to install a package for it. Alternatively you could explicitly exclude FFI dependencies to force DataStax to use its pure-Java implementation. I'd also check to see if a more recent DataStax update does a more graceful automatic fallback to pure-Java with a simple log message instead of a stacktrace; if they haven't already done so you should submit a ticket requesting it.

On Mon, Aug 28, 2017 at 10:56 PM, Ranjan Kumar <hereis...@gmail.com> wrote:

I am getting this error on server. Any idea?

atastax.driver.core.Native:113 - Could not load JNR C Library, native system calls through this library will not be available

java.lang.UnsatisfiedLinkError: could not load FFI provider jnr.ffi.provider.jffi.Provider

        at jnr.ffi.provider.InvalidProvider$1.loadLibrary(InvalidProvider.java:48)

        at jnr.ffi.LibraryLoader.load(LibraryLoader.java:290)

        at jnr.ffi.LibraryLoader.load(LibraryLoader.java:269)

        at com.datastax.driver.core.Native$LibCLoader.<clinit>(Native.java:108)

        at com.datastax.driver.core.Native.isGettimeofdayAvailable(Native.java:190)

        at com.datastax.driver.core.ClockFactory.newInstance(Clock.java:51)

        at com.datastax.driver.core.AbstractMonotonicTimestampGenerator.<init>(AbstractMonotonicTimestampGenerator.java:43)

        at com.datastax.driver.core.LoggingMonotonicTimestampGenerator.<init>(LoggingMonotonicTimestampGenerator.java:49)

        at com.datastax.driver.core.AtomicMonotonicTimestampGenerator.<init>(AtomicMonotonicTimestampGenerator.java:50)

        at com.datastax.driver.core.AtomicMonotonicTimestampGenerator.<init>(AtomicMonotonicTimestampGenerator.java:37)

        at com.datastax.driver.core.policies.Policies.defaultTimestampGenerator(Policies.java:121)

        at com.datastax.driver.core.policies.Policies$Builder.build(Policies.java:286)

        at com.datastax.driver.core.Cluster$Builder.getConfiguration(Cluster.java:1317)

        at com.datastax.driver.core.Cluster.<init>(Cluster.java:113)

        at com.datastax.driver.core.Cluster.buildFrom(Cluster.java:178)

        at com.datastax.driver.core.Cluster$Builder.build(Cluster.java:1335)

Caused by: java.lang.ExceptionInInitializerError

        at jnr.ffi.provider.jffi.NativeRuntime.getInstance(NativeRuntime.java:49)

        at jnr.ffi.provider.jffi.Provider.<init>(Provider.java:29)

        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)

        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)

        at java.lang.Class.newInstance(Class.java:442)

        at jnr.ffi.provider.FFIProvider$SystemProviderSingletonHolder.getInstance(FFIProvider.java:68)

        at jnr.ffi.provider.FFIProvider$SystemProviderSingletonHolder.<clinit>(FFIProvider.java:57)

        at jnr.ffi.provider.FFIProvider.getSystemProvider(FFIProvider.java:35)

        at jnr.ffi.LibraryLoader.create(LibraryLoader.java:73)

Caused by: java.lang.IllegalStateException: Can't overwrite cause with java.lang.UnsatisfiedLinkError: java.lang.UnsatisfiedLinkError: could not locate stub library in jar file.  Tried [jni/x86_64-Linux/libjffi-1.2.so, /jni/x86_64-Linux/libjffi-1.2.so]

        at com.kenai.jffi.internal.StubLoader.getStubLibraryStream(StubLoader.java:396)

        at com.kenai.jffi.internal.StubLoader.loadFromJar(StubLoader.java:345)

        at com.kenai.jffi.internal.StubLoader.load(StubLoader.java:254)

        at com.kenai.jffi.internal.StubLoader.<clinit>(StubLoader.java:434)

    at com.datastax.driver.core.Native.isGettimeofdayAvailable(Native.java:190)

    at com.datastax.driver.core.ClockFactory.newInstance(Clock.java:51)

        at com.datastax.driver.core.AbstractMonotonicTimestampGenerator.<init>(AbstractMonotonicTimestampGenerator.java:43)

        at com.datastax.driver.core.LoggingMonotonicTimestampGenerator.<init>(LoggingMonotonicTimestampGenerator.java:49)

        at com.datastax.driver.core.AtomicMonotonicTimestampGenerator.<init>(AtomicMonotonicTimestampGenerator.java:50)

        at com.datastax.driver.core.AtomicMonotonicTimestampGenerator.<init>(AtomicMonotonicTimestampGenerator.java:37)

        at com.datastax.driver.core.policies.Policies.defaultTimestampGenerator(Policies.java:121)

        at com.datastax.driver.core.policies.Policies$Builder.build(Policies.java:286)

        at com.datastax.driver.core.Cluster$Builder.getConfiguration(Cluster.java:1317)

        at com.datastax.driver.core.Cluster.<init>(Cluster.java:113)

        at com.datastax.driver.core.Cluster.buildFrom(Cluster.java:178)

        at com.datastax.driver.core.Cluster$Builder.build(Cluster.java:1335)

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[Ranjan Kumar]

Resolved by passing -Dcom.datastax.driver.USE_NATIVE_CLOCK=false  to JVM argument on app start up.

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