Network Issue

[ansidev]

I am running my applications using Docker and the application will print the following logs after running a long time then it does not work anymore. Rebooting the application does not solve the issue. Do you know what is the root cause and how to fix this issue? Thank you!

Log:

java.net.UnknownHostException: api.telegram.org
    at java.base/java.net.InetAddress$CachedAddresses.get(InetAddress.java:797) ~[na:na]
    at java.base/java.net.InetAddress.getAllByName0(InetAddress.java:1505) ~[na:na]
    at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1364) ~[na:na]
    at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1298) ~[na:na]
    at org.apache.http.impl.conn.SystemDefaultDnsResolver.resolve(SystemDefaultDnsResolver.java:45) ~[httpclient-4.5.12.jar!/:4.5.12]
    at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:112) ~[httpclient-4.5.12.jar!/:4.5.12]
    at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:376) ~[httpclient-4.5.12.jar!/:4.5.12]
    at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:393) ~[httpclient-4.5.12.jar!/:4.5.12]
    at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:236) ~[httpclient-4.5.12.jar!/:4.5.12]
    at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:186) ~[httpclient-4.5.12.jar!/:4.5.12]
    at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89) ~[httpclient-4.5.12.jar!/:4.5.12]
    at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110) ~[httpclient-4.5.12.jar!/:4.5.12]
    at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185) ~[httpclient-4.5.12.jar!/:4.5.12]
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83) ~[httpclient-4.5.12.jar!/:4.5.12]
    at org.telegram.telegrambots.updatesreceivers.DefaultBotSession$ReaderThread.getUpdatesFromServer(DefaultBotSession.java:254) ~[telegrambots-4.9.jar!/:na]
    at org.telegram.telegrambots.updatesreceivers.DefaultBotSession$ReaderThread.run(DefaultBotSession.java:195) ~[telegrambots-4.9.jar!/:na]

build.gradle dependency

implementation group: 'org.telegram', name: 'telegrambots-spring-boot-starter', version: '4.9'

[Chase22]

That could be a DNS issue. Is the bot running in Russia or China? These are known for blocking connections to telegram, you might have to set a Proxy

[ansidev]

That could be a DNS issue. Is the bot running in Russia or China? These are known for blocking connections to telegram, you might have to set a Proxy

The server is located in Vietnam. Do you have any suggestion about proxy?

[ansidev]

I solved my problem by add --dns 8.8.8.8 to the Docker command to config the DNS server for the Docker container.

[lee-qinghua]

i am in China ,i met the same question ,i tried to change the dns to 8.8.8.8,but it does`t work ,who can help me