gistfile1.txt

build-project:
     [echo] apache-cassandra: /home/ryan/fab/stress/b512f07478c936467cbecf7892b5598900bb7d10/build.xml
    [javac] Compiling 45 source files to /home/ryan/fab/stress/b512f07478c936467cbecf7892b5598900bb7d10/build/classes/thrift
    [javac] warning: Supported source version 'RELEASE_6' from annotation processor 'org.openjdk.jmh.generators.BenchmarkProcessor' less than -source '1.8'
    [javac] Note: /home/ryan/fab/stress/b512f07478c936467cbecf7892b5598900bb7d10/interface/thrift/gen-java/org/apache/cassandra/thrift/Cassandra.java uses or overrides a deprecated API.
    [javac] Note: Recompile with -Xlint:deprecation for details.
    [javac] Note: Some input files use unchecked or unsafe operations.
    [javac] Note: Recompile with -Xlint:unchecked for details.
    [javac] 1 warning
    [javac] Compiling 1169 source files to /home/ryan/fab/stress/b512f07478c936467cbecf7892b5598900bb7d10/build/classes/main
    [javac] /home/ryan/fab/stress/b512f07478c936467cbecf7892b5598900bb7d10/src/java/org/apache/cassandra/db/partitions/AtomicBTreePartition.java:159: error: unmappable character for encoding ASCII
    [javac]         // TODO: we could optimize comparison for "NativeRow" ?? la #6755
    [javac]                                                               ^
    [javac] /home/ryan/fab/stress/b512f07478c936467cbecf7892b5598900bb7d10/src/java/org/apache/cassandra/db/partitions/AtomicBTreePartition.java:159: error: unmappable character for encoding ASCII
    [javac]         // TODO: we could optimize comparison for "NativeRow" ?? la #6755
    [javac]                                                                ^
    [javac] /home/ryan/fab/stress/b512f07478c936467cbecf7892b5598900bb7d10/src/java/org/apache/cassandra/net/OutboundTcpConnection.java:107: error: unmappable character for encoding ASCII
    [javac]             logger.info("OutboundTcpConnection coalescing window set to {}??s", coalescingWindow);
    [javac]                                                                           ^
    [javac] /home/ryan/fab/stress/b512f07478c936467cbecf7892b5598900bb7d10/src/java/org/apache/cassandra/net/OutboundTcpConnection.java:107: error: unmappable character for encoding ASCII
    [javac]             logger.info("OutboundTcpConnection coalescing window set to {}??s", coalescingWindow);
    [javac]                                                                            ^
    [javac] /home/ryan/fab/stress/b512f07478c936467cbecf7892b5598900bb7d10/src/java/org/apache/cassandra/utils/CoalescingStrategies.java:172: error: unmappable character for encoding ASCII
    [javac]                 logger.info("{} gap {}??s", this, TimeUnit.NANOSECONDS.toMicros(averageGap));
    [javac]                                       ^
    [javac] /home/ryan/fab/stress/b512f07478c936467cbecf7892b5598900bb7d10/src/java/org/apache/cassandra/utils/CoalescingStrategies.java:172: error: unmappable character for encoding ASCII
    [javac]                 logger.info("{} gap {}??s", this, TimeUnit.NANOSECONDS.toMicros(averageGap));
    [javac]                                        ^
    [javac] 6 errors


  STDERR:

BUILD FAILED
/home/ryan/fab/stress/b512f07478c936467cbecf7892b5598900bb7d10/build.xml:804: Compile failed; see the compiler error output for details.

Total time: 16 seconds

do you have any idea why it's happening? version compatibility?