我试图提交Spark提交，但它作为奇怪的消息失败。

Error: Could not find or load main class org.apache.spark.launcher.Main
 /opt/spark/bin/spark-class: line 96: CMD: bad array subscript

这是我第一次看到这种错误。我试图检查spark类文件的代码，但无法解释是什么导致了这个问题。

# Turn off posix mode since it does not allow process substitution

set +o posix
CMD=()
DELIM=$'\n'
CMD_START_FLAG="false"
while IFS= read -d "$DELIM" -r ARG; do
  if [ "$CMD_START_FLAG" == "true" ]; then
    CMD+=("$ARG")
  else
    if [ "$ARG" == $'\0' ]; then
      # After NULL character is consumed, change the delimiter and consume command string.
      DELIM=''
      CMD_START_FLAG="true"
    elif [ "$ARG" != "" ]; then
      echo "$ARG"
    fi
  fi
done < <(build_command "$@")

COUNT=${#CMD[@]}
LAST=$((COUNT - 1))
LAUNCHER_EXIT_CODE=${CMD[$LAST]}

错误消息中提到的行是

LAUNCHER_EXIT_CODE=${CMD[$LAST]}

任何关于这个问题的指示或想法都会对我有很大帮助。
谢谢