ownTmpDir = new File(tmpDir, "fessTmpDir_" + sessionId);
            if (ownTmpDir.mkdirs()) {
                cmdList.add("-Djava.io.tmpdir=" + ownTmpDir.getAbsolutePath());
                cmdList.add("-Dpdfbox.fontcache=" + ownTmpDir.getAbsolutePath());
            } else {
                ownTmpDir = null;
            }
        }

        cmdList.add(ComponentUtil.getThumbnailManager().getThumbnailPathOption());