int () { if (!getOffsetMap().containsOffset(TAIL_OFFSET) && invalidateTrace != null) { throw new RuntimeExceptionWithAttachments("Tail offset invalid", new Attachment("invalidated", invalidateTrace)); } int offset = super.getTailOffset(); if (tailWatcher.getStartOffset() != tailWatcher.getEndOffset() && offset > 0) { watchTail(offset); } return offset; }