2880492 - XSA Deployment failure - Error writing request body to server - Best Practices for Troubleshooting

Deployment of an application in XSA fails with the following similar error e.g.:

com.sap.cloud.lm.sl.cf.persistence.services.FileStorageException: org.cloudfoundry.client.lib.CloudOperationException: 400 Bad Request: Could not asynchronously upload file META-INF/.sap_java_buildpack/tomcat/temp/<XXXXXXXXXX>.zip of application "<name of the application>": Could not get files to upload (Scanned 6750 files (87.0 MB) in 3 m 20 s (444 KB/s)): Error executing request PUT https://<hostname>:<port>/<...>: java.io.IOException: Error writing request body to server
[...]
Caused by: org.cloudfoundry.client.lib.CloudOperationException: 400 Bad Request: Could not asynchronously upload file META-INF/.sap_java_buildpack/tomcat/temp/<XXXXXXXXXX>.zip of application "<name of the application>": Could not get files to upload (Scanned 6750 files (87.0 MB) in 3 m 20 s (444 KB/s)): Error executing request PUT https://<hostname>:<port>/<...>: java.io.IOException: Error writing request body to server
[...]
Caused by: com.sap.xs2rt.client.exceptions.XsClientException: Could not get files to upload (Scanned 6750 files (87.0 MB) in 3 m 20 s (444 KB/s)): Error executing request PUT https://<hostname>:<port>/<...>: java.io.IOException: Error writing request body to server
[...]
Caused by: com.sap.xs2rt.core.rest.client.RestException: Error executing request PUT https://<hostname>:<port>/<...>: java.io.IOException: Error writing request body to server
[...]
Caused by: javax.ws.rs.ProcessingException: java.io.IOException: Error writing request body to server
[...]
Caused by: java.io.IOException: Error writing request body to server
 at sun.net.www.protocol.http.HttpURLConnection$StreamingOutputStream.checkError(HttpURLConnection.java:3603)
 at sun.net.www.protocol.http.HttpURLConnection$StreamingOutputStream.write(HttpURLConnection.java:3586)
[...]

SAP HANA extended application services, advanced model (XSA)

Checking BLOB download rate: FAILED, File system: Checking write performance: FAILED, xsa performance, xsa performance problem , KBA , BC-XS-RT , XS Advanced Runtime / XS Controller , BC-XS-SL-DS , HANA XS Advanced MTA Deployment Service , Problem