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  1. ,

    checkState() is Static convenience methods that help a method or constructor check whether it was invoked correctly (whether its preconditions have been met). This occurs when the precondition does not met.

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    Check if there is no nexus running. If not, delete sonatype-work/nexus/nexus.lock .

Solutions on the web

via Java.net JIRA by jan.supol, 1 year ago
Stream provider is not defined. It must be set before writing first bytes to the entity output stream.
via Stack Overflow by Jitendra Jangid
, 2 months ago
via Stack Overflow by BPdone
, 6 months ago
The driver is not executable: path/to/repo/./src/main/resources/Driver/GeckoDriver/geckodriver
via grokbase.com by Unknown author, 2 years ago
The path to the driver executable must be set by the webdriver.ie.driver system property; for more information, see The latest version can be downloaded from
via Google Groups by Ram Narayan, 1 year ago
The path to the driver executable must be set by the webdriver.gecko.driver system property; for more information, see https://github.com/mozilla/geckodriver. The latest version can be downloaded from https://github.com/mozilla/geckodriver/releases
java.lang.IllegalStateException: Stream provider is not defined. It must be set before writing first bytes to the entity output stream.	at com.google.common.base.Preconditions.checkState(Preconditions.java:149)	at org.glassfish.jersey.message.internal.CommittingOutputStream.commitStream(CommittingOutputStream.java:182)	at org.glassfish.jersey.message.internal.CommittingOutputStream.commitStream(CommittingOutputStream.java:177)	at org.glassfish.jersey.message.internal.CommittingOutputStream.commit(CommittingOutputStream.java:245)	at org.glassfish.jersey.message.internal.CommittingOutputStream.close(CommittingOutputStream.java:250)	at org.glassfish.jersey.message.internal.OutboundMessageContext.close(OutboundMessageContext.java:843)	at org.glassfish.jersey.message.internal.OutboundJaxrsResponse.close(OutboundJaxrsResponse.java:206)