Verify java client with custom header

[wenhaocs]

ERROR

caused by: com.vesoft.nebula.client.graph.exception.IOErrorException: HTTP Response code: 404	
at com.vesoft.nebula.client.graph.net.SyncConnection.open(SyncConnection.java:139) ~[client-3.6.1.jar:?]	
at com.vesoft.nebula.client.graph.SessionPool.createSessionObject(SessionPool.java:356) ~[client-3.6.1.jar:?]	
at com.vesoft.nebula.client.graph.SessionPool.init(SessionPool.java:122) ~[client-3.6.1.jar:?]	... 26 more"
}

Caused by: com.vesoft.nebula.client.graph.exception.IOErrorException: okhttp3.internal.http2.StreamResetException: stream was reset: NO_ERROR	
at com.vesoft.nebula.client.graph.net.SyncConnection.open(SyncConnection.java:139) ~[client-3.6.1.jar:?]	
at com.vesoft.nebula.client.graph.SessionPool.createSessionObject(SessionPool.java:356) ~[client-3.6.1.jar:?]	
at com.vesoft.nebula.client.graph.SessionPool.init(SessionPool.java:122) ~[client-3.6.1.jar:?]	... 26 more"
}

Config

SessionPoolConfig sessionPoolConfig = new SessionPoolConfig(addresses, graphSpace,
                    "root", "nebula");
            sessionPoolConfig.setUseHttp2(true);
            sessionPoolConfig.setCustomHeaders(customHeaders);
            SessionPool sessionPool = new SessionPool(sessionPoolConfig);
            boolean initResult =  sessionPool.init();
            if (!initResult) {
                LOGGER.error("Failed to init SessionPool.");
            }

Header: ImmutableMap.of("Route-Tag", "xxxx")

[HarrisChu]

[Nicole00]

[wenhaocs]

Thank you!

[Nicole00]

when the params are config incorrect, there's error log and exception. Just like:
wrong host "abc":

null address or null space