From users-return-19532-archive-asf-public=cust-asf.ponee.io@jena.apache.org Wed Mar 6 09:42:44 2019 Return-Path: X-Original-To: archive-asf-public@cust-asf.ponee.io Delivered-To: archive-asf-public@cust-asf.ponee.io Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by mx-eu-01.ponee.io (Postfix) with SMTP id B481C180656 for ; Wed, 6 Mar 2019 10:42:43 +0100 (CET) Received: (qmail 21461 invoked by uid 500); 6 Mar 2019 09:42:42 -0000 Mailing-List: contact users-help@jena.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: users@jena.apache.org Delivered-To: mailing list users@jena.apache.org Received: (qmail 21450 invoked by uid 99); 6 Mar 2019 09:42:41 -0000 Received: from pnap-us-west-generic-nat.apache.org (HELO spamd4-us-west.apache.org) (209.188.14.142) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 06 Mar 2019 09:42:41 +0000 Received: from localhost (localhost [127.0.0.1]) by spamd4-us-west.apache.org (ASF Mail Server at spamd4-us-west.apache.org) with ESMTP id 4E3BBC20A1 for ; Wed, 6 Mar 2019 09:42:41 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd4-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: 0.701 X-Spam-Level: X-Spam-Status: No, score=0.701 tagged_above=-999 required=6.31 tests=[HTML_MESSAGE=2, KAM_LAZY_DOMAIN_SECURITY=1, RCVD_IN_DNSWL_MED=-2.3, URIBL_BLOCKED=0.001] autolearn=disabled Received: from mx1-lw-eu.apache.org ([10.40.0.8]) by localhost (spamd4-us-west.apache.org [10.40.0.11]) (amavisd-new, port 10024) with ESMTP id ZiT37PsJeInr for ; Wed, 6 Mar 2019 09:42:39 +0000 (UTC) Received: from tmailer.gwdg.de (tmailer.gwdg.de [134.76.10.23]) by mx1-lw-eu.apache.org (ASF Mail Server at mx1-lw-eu.apache.org) with ESMTPS id 6B83460E01 for ; Wed, 6 Mar 2019 09:42:38 +0000 (UTC) Received: from excmbx-16.um.gwdg.de ([134.76.9.227] helo=email.gwdg.de) by mailer.gwdg.de with esmtp (Exim 4.90_1) (envelope-from ) id 1h1T4K-0007Vz-8W for users@jena.apache.org; Wed, 06 Mar 2019 10:42:32 +0100 Received: from EXCMBX-03.um.gwdg.de (134.76.9.218) by excmbx-16.um.gwdg.de (134.76.9.227) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5; Wed, 6 Mar 2019 10:42:32 +0100 Received: from EXCMBX-03.um.gwdg.de ([fe80::c022:aee6:d671:12de]) by EXCMBX-03.um.gwdg.de ([fe80::c022:aee6:d671:12de%20]) with mapi id 15.01.1713.004; Wed, 6 Mar 2019 10:42:32 +0100 From: "Walker, Andreas" To: "users@jena.apache.org" Subject: Error 500: No conversion to a Node: Thread-Topic: Error 500: No conversion to a Node: Thread-Index: AQHU0/908PQn1eSTiUej1x7Ocopudg== Date: Wed, 6 Mar 2019 09:42:32 +0000 Message-ID: <4793f7d1a7874a28b9af83f6499e3295@sub.uni-goettingen.de> Accept-Language: de-DE, en-US Content-Language: de-DE X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [134.76.162.165] Content-Type: multipart/alternative; boundary="_000_4793f7d1a7874a28b9af83f6499e3295subunigoettingende_" MIME-Version: 1.0 X-Virus-Scanned: (clean) by clamav --_000_4793f7d1a7874a28b9af83f6499e3295subunigoettingende_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Dear all, from time to time, my Fuseki server starts throwing the following error mes= sage on any SPARQL query I pose to one of my graphs: "Error 500: No conversion to a Node: " Unfortunately, I couldn't find any explanation of this error message, beyon= d a discussion of a corrupted TDB2 database. (https://users.jena.apache.narkive.com/LF4XE801/corrupted-tdb2-database) Once this happens, the only thing I could do so far is to drop the entire a= fflicted graph and rebuild it, but of course that isn't going to be a viabl= e solution in the long term. The only way I interact with Fuseki is by starting and stopping it, queryin= g it via the SPARQL endpoint (and sometimes through the web interface, e.g.= when troubleshooting my application), and uploading new triples (as turtle= files) via the web interface. I haven't been able to find a pattern in whe= n the error appears so far. Any insights into why this error appears, and what to do in order to avoid = it? I'd appreciate any help. Best, Andreas --_000_4793f7d1a7874a28b9af83f6499e3295subunigoettingende_--