Hi Jörg, I'm using latest 1.84.0 and I do nothing special, I start my application where I configured Oak repository with mbean:
MBeanServer mbs = ManagementFactory.getPlatformMBeanServer(); Oak oak = new Oak(ns).with(mbs); ... then open visualvm or jconsole, attach to local jvm, see all available mbean and then try to run the operations showed in mbean, now I was interested in experimenting with nodeCounter which has two operations: getEstimatedNodeCount retunring long and getEstimatedChildNodeCounts which returns a String. I know that from visualvm or jconsole, mbean returning "complex" string, sometimes are not properly shown but I see a blank string, and the other operation which returns a long? It is very strange. As parameters I set the root node, so "/" and thats'all. Does it work for you? Cordiali saluti / Best regards, Raffaele Gambelli Application Architect ________________________________ From: Jörg Hoh <[email protected]> Sent: Wednesday, September 3, 2025 2:50 PM To: [email protected] <[email protected]> Subject: Re: Unable to get values from mbean "nodeCounter" Hi Raffaele, what Oak version are you using? And when you connect via jconsole to that JVM, does it return a proper value? Jörg Am Mi., 3. Sept. 2025 um 09:19 Uhr schrieb Raffaele Gambelli <[email protected]>: > Hi all, > > as described here > https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fjackrabbit.apache.org%2Foak%2Fdocs%2Fquery%2Fquery-troubleshooting.html&data=05%7C02%7CRaffaele.Gambelli%40cegeka.com%7C230be0e4a8464b88a8f508ddeae876e5%7C42151053019347aa9e81effd81f772cc%7C0%7C0%7C638925006338943685%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=ukiteC6V5PMfkXabmojmevUSOtIZj0fxw3ZJYw1ASgc%3D&reserved=0<https://jackrabbit.apache.org/oak/docs/query/query-troubleshooting.html> > I > wanted to get values from meabn nodeCounter but I'm not able to get them, I > see always a blank string as output. > > I tried either with visualvm or with jconsole, do you have any hints? > > Thanks > > > Cordiali saluti / Best regards, > > *Raffaele Gambelli* > *Application Architect* > *E* *[email protected] <[email protected]>* > *M* +39 3371641888 > > [image: CEGEKA] > Via Ettore Cristoni, 84 > IT-40033 Bologna (IT), Italy > *T* +39 02 2544271 > *https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.cegeka.com%2F&data=05%7C02%7CRaffaele.Gambelli%40cegeka.com%7C230be0e4a8464b88a8f508ddeae876e5%7C42151053019347aa9e81effd81f772cc%7C0%7C0%7C638925006338972176%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=o0mXNVOSfdUyLdQCkKHepISky5EgGK6menXWAzwMZPE%3D&reserved=0 > > <https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.cegeka.com%2F&data=05%7C02%7CRaffaele.Gambelli%40cegeka.com%7C230be0e4a8464b88a8f508ddeae876e5%7C42151053019347aa9e81effd81f772cc%7C0%7C0%7C638925006338984295%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=aEvx0c7f%2BP0E1JEtn7v37ZZ9tPuUz%2B3tObrAA8%2FQL54%3D&reserved=0<https://www.cegeka.com/>> > * > > > > > > <https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fcampaigns.signature365.com%2Feu-B2uKnHEFS98nwDUb-xnoLLs9dLzfDepbj%2Fgen_Pfjgxe5SOOkn66Ch%2Fgo%2FuHO&data=05%7C02%7CRaffaele.Gambelli%40cegeka.com%7C230be0e4a8464b88a8f508ddeae876e5%7C42151053019347aa9e81effd81f772cc%7C0%7C0%7C638925006338997145%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=lEIhULkzQmbD1YSxyvybKKX8AX6laUWuEpUD6546C8A%3D&reserved=0<https://campaigns.signature365.com/eu-B2uKnHEFS98nwDUb-xnoLLs9dLzfDepbj/gen_Pfjgxe5SOOkn66Ch/go/uHO>> > > *Dichiarazione di Riservatezza > <https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fcampaigns.signature365.com%2Feu-B2uKnHEFS98nwDUb-xnoLLs9dLzfDepbj%2Fgen_Pfjgxe5SOOkn66Ch%2Fgo%2FuHO&data=05%7C02%7CRaffaele.Gambelli%40cegeka.com%7C230be0e4a8464b88a8f508ddeae876e5%7C42151053019347aa9e81effd81f772cc%7C0%7C0%7C638925006339009064%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=2eWOwL91TMnFZ5vx6e9Eh1HVFIWe0DH0%2BOreb8PijT0%3D&reserved=0<https://campaigns.signature365.com/eu-B2uKnHEFS98nwDUb-xnoLLs9dLzfDepbj/gen_Pfjgxe5SOOkn66Ch/go/uHO>>* > > Le informazioni contenute nella mail sono riservate. 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