Date: Tue, 21 Jul 2020 00:36:14 GMT
```

### Checking cluster health for maintenance

You may query the cluster probe endpoint to check if the node which received the request can be taken down for maintenance, if the server replies back '412 Precondition Failed' this means you will lose HA. '200 OK' means you are okay to proceed.

```
curl http://minio1:9001/minio/health/cluster?maintenance=true
HTTP/1.1 412 Precondition Failed
Accept-Ranges: bytes

      cache.delete()
    }
  }

  @Test
  fun corruptedCipher() {
    val response =
      testCorruptingCache {
        corruptMetadata {
          // mess with cipher suite
          it.replace("TLS_", "SLT_")
        }
      }

    assertThat(response.body.string()).isEqualTo("ABC.1") // cached
    assertThat(cache.requestCount()).isEqualTo(2)
    assertThat(cache.networkCount()).isEqualTo(1)

            }
            if (line.charAt(0) == '#') {
                if (line.startsWith("#INCLUDE ")) {
                    line = line.substring(line.indexOf('\\'));
                    final String url = "smb1:" + line.replace('\\', '/');

                    if (alt > 0) {
                        try {
                            populate(new InputStreamReader(new SmbFileInputStream(url)));

sleep 30s

./mc alias set site1 http://site1-nginx:9001 minioadmin minioadmin --api s3v4
./mc alias set site2 http://site2-nginx:9002 minioadmin minioadmin --api s3v4

./mc ready site1/
./mc ready site2/

./mc admin replicate add site1 site2
./mc mb site1/testbucket/
./mc cp -r --quiet /usr/bin site1/testbucket/

sleep 5

./s3-check-md5 -h

reateDocumentFragment,b.frag=b.createFrag()),a.createElement=function(c){return t.shivMethods?g(c,a,b):b.createElem(c)},a.createDocumentFragment=Function("h,f","return function(){var n=f.cloneNode(),c=n.createElement;h.shivMethods&&("+d().join().replace(/[\w\-:]+/g,function(a){return b.createElem(a),b.frag.createElement(a),'c("'+a+'")'})+");return n}")(t,b.frag)}function j(a){a||(a=b);var d=f(a);return!t.shivCSS||k||d.hasCSS||(d.hasCSS=!!c(a,"article,aside,dialog,figcaption,figure,footer,header,...

     * and removing the "Searcher" suffix.
     *
     * @return the searcher name
     */
    public String getName() {
        if (name == null) {
            name = StringUtil.decamelize(this.getClass().getSimpleName().replace("Searcher", StringUtil.EMPTY)).toLowerCase(Locale.ENGLISH);
        }
        return name;
    }

    /**
     * Executes a search operation with the specified parameters.

     *     exception by calling [HttpUrl.parse]; it returns null for invalid URLs.
     */
    open fun url(url: String): Builder = url(canonicalUrl(url).toHttpUrl())

    // Silently replace web socket URLs with HTTP URLs.
    private fun canonicalUrl(url: String) =
      when {
        url.startsWith("ws:", ignoreCase = true) -> "http:${url.substring(3)}"

   * methods {@link Map#containsValue containsValue}, {@link ConcurrentMap#remove(Object, Object)
   * remove(Object, Object)} and {@link ConcurrentMap#replace(Object, Object, Object) replace(K, V,
   * V)}, and may not be what you expect.
   *
   * @throws IllegalStateException if the value strength was already set
   * @see WeakReference
   */
  @CanIgnoreReturnValue

        <constraint name="transform" within="" contains="" />
      </replaceConfiguration>

| `minio_bucket_replication_last_hour_failed_bytes`                   | Total number of bytes on a bucket which failed to replicate at least once in the last hour. <br><br>Type: gauge | `bucket`, `server`                                    |
| `minio_bucket_replication_last_hour_failed_count`                   | Total number of objects on a bucket which failed to replicate in the last hour. <br><br>Type: gauge             | `bucket`, `server`                                    |