Hi ,all: When compiling spark1.4.0 with java1.6.0_20 (maven version: 3.2.5, scala vertion: 2.10.4), I always encounter the compiling error as followed:
****/spark-1.4.0/unsafe/src/main/java/org/apache/spark/unsafe/PlatformDependent.java:149: copyMemory(long,long,long) in sun.misc.Unsafe cannot be applied to (java.lang.Object,long,java.lang.Object,long,long) [ERROR] _UNSAFE.copyMemory(src, srcOffset, dst, dstOffset, size); [ERROR] ^ [ERROR] 1 error [INFO] ------------------------------------------------------------------------ [INFO] Reactor Summary: [INFO] [INFO] Spark Project Parent POM ........................... SUCCESS [ 7.304 s] [INFO] Spark Launcher Project ............................. SUCCESS [ 13.355 s] [INFO] Spark Project Networking ........................... SUCCESS [ 11.703 s] [INFO] Spark Project Shuffle Streaming Service ............ SUCCESS [ 5.817 s] [INFO] Spark Project Unsafe ............................... FAILURE [ 1.048 s] [INFO] Spark Project Core ................................. SKIPPED [INFO] Spark Project Bagel ................................ SKIPPED [INFO] Spark Project GraphX ............................... SKIPPED [INFO] Spark Project Streaming ............................ SKIPPED [INFO] Spark Project Catalyst ............................. SKIPPED [INFO] Spark Project SQL .................................. SKIPPED [INFO] Spark Project ML Library ........................... SKIPPED [INFO] Spark Project Tools ................................ SKIPPED [INFO] Spark Project Hive ................................. SKIPPED [INFO] Spark Project REPL ................................. SKIPPED [INFO] Spark Project YARN ................................. SKIPPED [INFO] Spark Project Assembly ............................. SKIPPED [INFO] Spark Project External Twitter ..................... SKIPPED [INFO] Spark Project External Flume Sink .................. SKIPPED [INFO] Spark Project External Flume ....................... SKIPPED [INFO] Spark Project External MQTT ........................ SKIPPED [INFO] Spark Project External ZeroMQ ...................... SKIPPED [INFO] Spark Project External Kafka ....................... SKIPPED [INFO] Spark Project Examples ............................. SKIPPED [INFO] Spark Project External Kafka Assembly .............. SKIPPED [INFO] Spark Project YARN Shuffle Service ................. SKIPPED [INFO] ------------------------------------------------------------------------ [INFO] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] Total time: 40.705 s [INFO] Finished at: 2015-06-26T09:15:33+08:00 [INFO] Final Memory: 74M/838M [INFO] ------------------------------------------------------------------------ [ERROR] Failed to execute goal net.alchim31.maven:scala-maven-plugin:3.2.1:compile (scala-compile-first) on project spark-unsafe_2.10: Execution scala-compile-first of goal net.alchim31.maven:scala-maven-plugin:3.2.1:compile failed. CompileFailed -> [Help 1] [ERROR] [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch. [ERROR] Re-run Maven using the -X switch to enable full debug logging. [ERROR] [ERROR] For more information about the errors and possible solutions, please read the following articles: [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException [ERROR] [ERROR] After correcting the problems, you can resume the build with the command [ERROR] mvn <goals> -rf :spark-unsafe_2.10 According to the error info “/PlatformDependent.java:149: copyMemory(long,long,long) in sun.misc.Unsafe cannot be applied to (java.lang.Object,long,java.lang.Object,long,long)”，I find this in PlatformDependent.java： 141 static public void copyMemory( 142 Object src, 143 long srcOffset, 144 Object dst, 145 long dstOffset, 146 long length) { 147 while (length > 0) { 148 long size = Math.min(length, UNSAFE_COPY_THRESHOLD); 149 _UNSAFE.copyMemory(src, srcOffset, dst, dstOffset, size); 150 length -= size; 151 srcOffset += size; 152 dstOffset += size; 153 } 154 } It seems that copyMemory (java.lang.Object,long,java.lang.Object,long,long) is introduced since Java7？ But According to the official document， "Spark runs on Java 6+, Python 2.6+ and R 3.1+. For the Scala API, Spark 1.4.0 uses Scala 2.10. You will need to use a compatible Scala version (2.10.x)." So, how can I compile spark1.4.0 successfully with java1.6.0_20? Does anybody have the same error? Thank you very much for help：） Sincerely， Young
