WebGISDR进行恢复时报错server无响应

Failed to restore the ArcGIS server:...6443 failed to respond
解决方案信息
问题描述：

WebGISDR进行恢复时报错server无响应,webgisdr的log信息为
Failed to restore the ArcGIS server:
Url: https://server.geoscene.com/server.
org.apache.http.NoHttpResponseException:server.geoscene.com:6443 failed to respond

Server的error log信息为
java.lang.OutOfMemoryError: unable to create new native thread

每次恢复失败，Server为都停机状态。
Xshell自动掉线。