java - PhantomJS 驱动程序无法启动

Question

我在启动 PhantomJS 驱动程序时遇到问题。它在我的本地计算机 (OSX) 上运行良好，但在服务器 (Linux) 上启动它时遇到问题。

以下是导致问题的代码:

DesiredCapabilities dcap = new DesiredCapabilities();
String[] phantomArgs = new  String[] { "--webdriver-loglevel=NONE" };
dcap.setCapability(PhantomJSDriverService.PHANTOMJS_CLI_ARGS, phantomArgs);
dcap.setCapability("phantomjs.binary.path", "/usr/local/bin/phantomjs");
WebDriver driver = new PhantomJSDriver(dcap);

这是问题的堆栈跟踪:

[ERROR] [09/09/2015 18:32:45.517] [pipeline-akka.actor.default-dispatcher-11] [akka://pipeline/user/$u] Could not start a new session. Possible causes are invalid address of the remote server or browser start-up failure.
Build info: version: 'unknown', revision: 'unknown', time: 'unknown'
System info: host: os.name: 'Linux', os.arch: 'amd64', os.version: '3.14.48-33.39.amzn1.x86_64', java.version: '1.8.0_60'
Driver info: driver.version: PhantomJSDriver
org.openqa.selenium.remote.UnreachableBrowserException: Could not start a new session. Possible causes are invalid address of the remote server or browser start-up failure.
Build info: version: 'unknown', revision: 'unknown', time: 'unknown'
System info: host: os.name: 'Linux', os.arch: 'amd64', os.version: '3.14.48-33.39.amzn1.x86_64', java.version: '1.8.0_60'
Driver info: driver.version: PhantomJSDriver
        at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:589)
        at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:240)
        at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:126)
        at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:139)
        at org.openqa.selenium.phantomjs.PhantomJSDriver.<init>(PhantomJSDriver.java:110)
        at org.openqa.selenium.phantomjs.PhantomJSDriver.<init>(PhantomJSDriver.java:99)
        at com.example.p.Test.ingest(GoogleGetLinksPipe.java:48)
        at com.example.p.Test.ingest(GoogleGetLinksPipe.java:22)
        at com.example.p.AbstractPipe.onReceive(AbstractPipe.java:39)
        at akka.actor.UntypedActor$$anonfun$receive$1.applyOrElse(UntypedActor.scala:167)
        at akka.actor.Actor$class.aroundReceive(Actor.scala:467)
        at akka.actor.UntypedActor.aroundReceive(UntypedActor.scala:97)
        at akka.actor.ActorCell.receiveMessage(ActorCell.scala:516)
        at akka.actor.ActorCell.invoke(ActorCell.scala:487)
        at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:238)
        at akka.dispatch.Mailbox.run(Mailbox.scala:220)
        at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:397)
        at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
        at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
        at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
        at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
Caused by: org.openqa.selenium.WebDriverException: Timed out waiting for driver server to start.
Build info: version: 'unknown', revision: 'unknown', time: 'unknown'
System info: host: os.name: 'Linux', os.arch: 'amd64', os.version: '3.14.48-33.39.amzn1.x86_64', java.version: '1.8.0_60'
Driver info: driver.version: PhantomJSDriver
        at org.openqa.selenium.remote.service.DriverService.start(DriverService.java:165)
        at org.openqa.selenium.phantomjs.PhantomJSCommandExecutor.execute(PhantomJSCommandExecutor.java:78)
        at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:568)
        ... 20 more
Caused by: org.openqa.selenium.net.UrlChecker$TimeoutException: Timed out waiting for [http://localhost:8092/status] to be available after 20000 ms
        at org.openqa.selenium.net.UrlChecker.waitUntilAvailable(UrlChecker.java:104)
        at org.openqa.selenium.remote.service.DriverService.start(DriverService.java:163)
        ... 22 more
Caused by: com.google.common.util.concurrent.UncheckedTimeoutException: java.util.concurrent.TimeoutException
        at com.google.common.util.concurrent.SimpleTimeLimiter.callWithTimeout(SimpleTimeLimiter.java:143)
        at org.openqa.selenium.net.UrlChecker.waitUntilAvailable(UrlChecker.java:79)
        ... 23 more
Caused by: java.util.concurrent.TimeoutException
        at java.util.concurrent.FutureTask.get(Unknown Source)
        at com.google.common.util.concurrent.SimpleTimeLimiter.callWithTimeout(SimpleTimeLimiter.java:130)
        ... 24 more

我从源代码构建了 PhantomJS，并且之前它已经工作过 - 它通过了测试，运行得很好。此外，它可以在我的机器上本地运行。关于可能导致该问题的原因有什么想法吗？

Answer 1

问题是由于 phantomjs 无法写入日志文件。更改日志文件的文件权限解决了该问题。