我有以下build.sbt文件：
name := "myProject"
version := "1.0"
scalaVersion := "2.11.8"
javaOptions ++= Seq("-Xms512M", "-Xmx2048M", "-XX:MaxPermSize=2048M", "-XX:+CMSClassUnloadingEnabled")
dependencyOverrides ++= Set(
"com.fasterxml.jackson.core" % "jackson-core" % "2.8.1"
)
// additional libraries
libraryDependencies ++= Seq(
"org.apache.spark" %% "spark-core" % "2.0.0" % "provided",
"org.apache.spark" %% "spark-sql" % "2.0.0" % "provided",
"org.apache.spark" %% "spark-hive" % "2.0.0" % "provided",
"com.databricks" %% "spark-csv" % "1.4.0",
"org.scalactic" %% "scalactic" % "2.2.1",
"org.scalatest" %% "scalatest" % "2.2.1" % "test",
"org.scalacheck" %% "scalacheck" % "1.12.4",
"com.holdenkarau" %% "spark-testing-base" % "2.0.0_0.4.4" % "test",
)
但是，当我运行代码时，我收到此错误：
An exception or error caused a run to abort.
java.lang.ExceptionInInitializerError
Caused by: com.fasterxml.jackson.databind.JsonMappingException: Jackson version is too old 2.4.4
at com.fasterxml.jackson.module.scala.JacksonModule$class.setupModule(JacksonModule.scala:56)
at com.fasterxml.jackson.module.scala.DefaultScalaModule.setupModule(DefaultScalaModule.scala:19)
at com.fasterxml.jackson.databind.ObjectMapper.registerModule(ObjectMapper.java:549)
at org.apache.spark.rdd.RDDOperationScope$.<init>(RDDOperationScope.scala:82)
at org.apache.spark.rdd.RDDOperationScope$.<clinit>(RDDOperationScope.scala)
... 58 more
为什么会这样？
我已将dependencyOverrides的新版本添加到 ////
//PHP 5.3 + Class find and replace string in files
//
//by Bruce Afruz
//
//2013
//
//example usage for single file:
//
//$new = new fileReplacement('./');
//$new->setExt("check.php");
//$new->changeContents("hello", "goodbye");
//
//example usage for multiple files:
//
//$new = new fileReplacement('./test');
//$new->setExt("*.html");
//$new->changeContents("hello", "goodbye");
//
//to change directory:
//
//$new = new fileReplacement('./test');
//$new->setDir("./test2");
//$new->setExt("*.html");
//$new->changeContents("hello", "goodbye");
////
class fileReplacement
{
private $ext , $dir ;
public function getDir() {
return $this->dir;
}
public function setDir($dir) {
$this->dir = $dir;
}
public function getExt() {
return $this->ext;
}
public function setExt($ext) {
$this->ext = $ext;
}
function __construct($dir) {
$this->dir = $dir;
}
public function rglob($pattern = '*', $flags = 0, $path = '') {
chdir($this->getDir());
$paths = glob($path . '*', GLOB_MARK | GLOB_ONLYDIR | GLOB_NOSORT);
$files = glob($path . $pattern, $flags);
foreach ($paths as $path) {
$files = array_merge($files, $this->rglob($pattern, $flags, $path));
}
return $files;
}
public function changeContents($replace , $sentence , $flags = 0, $path = '') {
$all = $this->rglob($this->getExt() , $flags, $path);
foreach ($all as $file) {
$filename = $file;
$handle = fopen($filename, "r");
$contents = fread($handle, filesize($filename));
fclose($handle);
$contents = str_replace($replace , $sentence, $contents);
if (is_writable($filename)) {
if (!$handle = fopen($filename, 'w+')) {
echo "Cannot open file ($filename)
";
exit;
}
// Write $contents to our opened file.
if (fwrite($handle, $contents) === FALSE) {
echo "Cannot write to file ($filename)
";
exit;
}
echo "Success, wrote content to file ($filename)
";
fclose($handle);
} else {
echo "The file $filename is not writable
";
}
}
}}
（查看此处has mentioned in documentation后），因此不应使用旧版本。
答案 0 :(得分：3)
jackson-core和jackson-databind版本应该匹配（至少在次要版本中，我相信）。
请删除dependencyOverrides并拥有
libraryDependencies ++= Seq(
...
"com.fasterxml.jackson.core" % "jackson-databind" % "2.8.1"
)
或在dependencyOverrides
dependencyOverrides ++= Set(
"com.fasterxml.jackson.core" % "jackson-core" % "2.8.1"
"com.fasterxml.jackson.core" % "jackson-databind" % "2.8.1"
)
虽然我不确定我明白你要做什么;链接的问题似乎表明你应该使用旧版本（2.4.4）。