private void deleteBlock(CachedUrl cu) throws IOException { log.info("deleting " + cu.getUrl()); CachedUrlSetSpec cuss = new SingleNodeCachedUrlSetSpec(cu.getUrl()); ArchivalUnit au = cu.getArchivalUnit(); CachedUrlSet cus = au.makeCachedUrlSet(cuss); NodeManager nm = au.getPlugin().getDaemon().getNodeManager(au); nm.deleteNode(cus); }