Seems like that VM arg is only read at startup time of the JVM according to this post, so setting it in code may not work
https://stackoverflow.com/questions/9882357/how-to-set-java-net-preferipv4stack-true-at-runtime You might want to try it as a VM argument On Thu, Sep 2, 2021 at 10:22 AM Kamlesh Joshi <kamlesh.jo...@ril.com> wrote: > Hi Yohan, > > > > We have already added this but not as a JVM param but via a code, like > setting in system properties. Still the issue persists. > > > > Any other work around? > > > > *Thanks and Regards,* > > *Kamlesh Joshi* > > > > *From:* Yohan Fernando <yohan.fernando.1...@gmail.com> > *Sent:* 02 September 2021 14:44 > *To:* user@ignite.apache.org > *Subject:* [External]Re: Client taking long time to connect to cluster > > > > The e-mail below is from an external source. Please do not open > attachments or click links from an unknown or suspicious origin. > > We had a similar problem. Try adding -Djava.net.preferIPv4Stack=true to > the VM parameters. > > > > On Wed, Sep 1, 2021 at 3:22 PM Kamlesh Joshi <kamlesh.jo...@ril.com> > wrote: > > Hi Igniters, > > > > We have upgraded OS version from Red Hat 6.10(Santiago) to 7.8(Maipo) in > Client server. Ignite cluster nodes’ OS are already on 7.8, we just > upgraded client server OS. > > > > After upgrading client server, we are facing slow connections with cluster > almost 5 mints. Sometimes it's not even able to connect to cluster from the > client server, so had to retry multiple times. > > We have another client server with OS version 6.10 from which we are not > facing such issue. > > > > *Is there any issue compatibility issue with Red Hat 7.8 version. We are > using ignite 2.7.6 version.* > > > > *Please find netstat output below of upgraded client server:* > > > > Proto Recv-Q Send-Q Local Address Foreign Address > State PID/Program name > > (Not all processes could be identified, non-owned process info > > will not be shown, you would have to be root to see it all.) > > tcp 0 0 0.0.0.0:47101 > <https://protect2.fireeye.com/v1/url?k=f4f8b493-ab631c41-f4f93e6c-002590870bcc-cbcfd1ae6e65752e&q=1&e=9b8089c8-b380-40b8-bb36-28341ac14350&u=http%3A%2F%2F0.0.0.0%3A47101%2F> > 0.0.0.0:* LISTEN 38647/bwengine > > tcp 0 0 0.0.0.0:10801 > <https://protect2.fireeye.com/v1/url?k=5a0620fc-059d882e-5a07aa03-002590870bcc-921d5ddf6fec6227&q=1&e=9b8089c8-b380-40b8-bb36-28341ac14350&u=http%3A%2F%2F0.0.0.0%3A10801%2F> > 0.0.0.0:* LISTEN 38647/bwengine > > *tcp 6674800 0 ClientIP:49917 ServerIP:47500 > ESTABLISHED 38647/bwengine* > > udp 0 0 127.0.0.1:49634 > <https://protect2.fireeye.com/v1/url?k=639f5349-3c04fb9b-639ed9b6-002590870bcc-75bf9510e355eff1&q=1&e=9b8089c8-b380-40b8-bb36-28341ac14350&u=http%3A%2F%2F127.0.0.1%3A49634%2F> > 127.0.0.1:53 > <https://protect2.fireeye.com/v1/url?k=048f0efb-5b14a629-048e8404-002590870bcc-58dca837aa1e0fe7&q=1&e=9b8089c8-b380-40b8-bb36-28341ac14350&u=http%3A%2F%2F127.0.0.1%3A53%2F> > ESTABLISHED 38647/bwengine > > unix 2 [ ] STREAM CONNECTED 142186514 38647/bwengine > > unix 3 [ ] STREAM CONNECTED 142148803 38647/bwengine > > unix 2 [ ] STREAM CONNECTED 142053176 38647/bwengine > > unix 3 [ ] STREAM CONNECTED 142112733 38647/bwengine > > unix 3 [ ] STREAM CONNECTED 142148802 38647/bwengine > > unix 3 [ ] STREAM CONNECTED 142112732 38647/bwengine > > > > Any pointers on this would be helpful. > > > > *Thanks and Regards,* > > *Kamlesh Joshi* > > > > > "*Confidentiality Warning*: This message and any attachments are intended > only for the use of the intended recipient(s), are confidential and may be > privileged. If you are not the intended recipient, you are hereby notified > that any review, re-transmission, conversion to hard copy, copying, > circulation or other use of this message and any attachments is strictly > prohibited. If you are not the intended recipient, please notify the sender > immediately by return email and delete this message and any attachments > from your system. > > *Virus Warning:* Although the company has taken reasonable precautions to > ensure no viruses are present in this email. The company cannot accept > responsibility for any loss or damage arising from the use of this email or > attachment." > > > "*Confidentiality Warning*: This message and any attachments are intended > only for the use of the intended recipient(s), are confidential and may be > privileged. If you are not the intended recipient, you are hereby notified > that any review, re-transmission, conversion to hard copy, copying, > circulation or other use of this message and any attachments is strictly > prohibited. If you are not the intended recipient, please notify the sender > immediately by return email and delete this message and any attachments > from your system. > > *Virus Warning:* Although the company has taken reasonable precautions to > ensure no viruses are present in this email. The company cannot accept > responsibility for any loss or damage arising from the use of this email or > attachment." >
