addSystemProperty(cmdList, Constants.FESS_VAR_PATH, null, null);
        addSystemProperty(cmdList, Constants.FESS_THUMBNAIL_PATH, null, null);
        addSystemProperty(cmdList, "fess.log.name", getLogName("fess"), getLogName(StringUtil.EMPTY));
        if (logLevel != null) {
            cmdList.add("-Dfess.log.level=" + logLevel);
        }
        stream(fessConfig.getJvmThumbnailOptionsAsArray())

            logFilePath = value != null ? value : new File(targetDir, "logs").getAbsolutePath();
        }
        cmdList.add("-Dfess.log.path=" + logFilePath);
        addSystemProperty(cmdList, "fess.log.name", getLogName("fess"), getLogName(StringUtil.EMPTY));
        if (logLevel == null) {
            addSystemProperty(cmdList, "fess.log.level", null, null);
        } else {
            cmdList.add("-Dfess.log.level=" + logLevel);
        }

                }
            }
            prop.store(out, cmdList.toString());
        } catch (final IOException e) {
            throw new IORuntimeException(e);
        }
    }

    protected String getLogName(final String logPrefix) {
        if (logSuffix.length() > 0) {
            return logPrefix + "-" + getExecuteType() + "-" + logSuffix;
        }
        return logPrefix + "-" + getExecuteType();
    }

        cmdList.add("-Dfess.log.path=" + (logFilePath != null ? logFilePath : systemHelper.getLogFilePath()));
        addSystemProperty(cmdList, "fess.log.name", getLogName("fess"), getLogName(StringUtil.EMPTY));
        if (logLevel == null) {
            addSystemProperty(cmdList, "fess.log.level", null, null);
        } else {
            cmdList.add("-Dfess.log.level=" + logLevel);